OKX
Founded in 2017, OKX is a cryptocurrency exchange that offers spot, margin, perpetual swap, futures, options, spread, and event contract trading. This integration supports live market data ingest and order execution on OKX.
Overview
This adapter is implemented in Rust and exposed to Python through PyO3 bindings. It does not require external OKX client libraries.
The OKX adapter includes multiple components, which can be used separately or together:
OKXHttpClient: Low-level HTTP API connectivity.OKXWebSocketClient: Low-level WebSocket API connectivity.OKXDataClient: Market data feed manager.OKXExecutionClient: Account management and trade execution gateway.OKXDataClientFactory: Factory for OKX data clients.OKXExecutionClientFactory: Factory for OKX execution clients.
Most users will define a configuration for a live trading node (as shown below), and won't need to work directly with these lower-level components.
Examples
Product support
| Product | Instrument source | Data | Exec | Notes |
|---|---|---|---|---|
| Spot | public/instruments | Yes | Yes | Spot trading pairs. |
| Margin | public/instruments | Yes | Yes | Spot instruments with margin or leverage. |
| Perpetual swaps | public/instruments | Yes | Yes | Linear and inverse contracts. |
| Futures | public/instruments | Yes | Yes | Dated futures contracts. |
| Options | public/instruments | Yes | Yes | Limit‑style orders; requires family filters. |
| Spreads | sprd/spreads | Yes | Yes | Snapshots, quotes, trades on business WS. |
| Event contracts | event-contract/* endpoints | Yes | Yes | Parsed as Nautilus BinaryOption. |
Relevant OKX docs:
- Get instruments.
- Get limit price.
- Get Spreads (Public).
- Spread trading place order.
- Event contract series.
Options support: The adapter supports options market data, venue-provided Greeks
(subscribe_option_greeks), and order execution for options instruments. See the
Options trading section below for details and the
Options guide for subscription patterns.
Instrument multipliers: For derivatives (SWAP, FUTURES, OPTION), instrument
multipliers are calculated as the product of OKX's ctMult and ctVal fields. This
keeps position sizing aligned with OKX contract size and value.
Price limits: OKX exposes initPxLmtPct, floatPxLmtPct, and maxPxLmtPct
on public/instruments for spot, margin, swap, and futures instruments. The adapter
preserves non-empty values in the instrument info field as okx_init_px_lmt_pct,
okx_float_px_lmt_pct, and okx_max_px_lmt_pct. These fields describe exchange
band percentages, so they are not parsed as static Nautilus min_price or max_price
values.
Use OKXHttpClient.request_price_limit(instrument_id) when you need the current computed
buy and sell limits from OKX's GET /api/v5/public/price-limit endpoint. OKX documents
the percentage fields as empty for options and event contracts; the adapter leaves their
instrument info unchanged.
OKX finance-product endpoints such as /api/v5/finance/okusd/* are outside the OKX
trading adapter surface.
Symbology
OKX uses specific symbol conventions for different instrument types. Add the .OKX
suffix when referencing instruments in Nautilus, for example BTC-USDT.OKX.
Symbol format by instrument type
SPOT
Format: {BaseCurrency}-{QuoteCurrency}
Examples:
BTC-USDT- Bitcoin against USDT (Tether)BTC-USDC- Bitcoin against USDCETH-USDT- Ethereum against USDTSOL-USDT- Solana against USDT
To subscribe to spot Bitcoin USD in your strategy:
InstrumentId.from_str("BTC-USDT.OKX") # For USDT-quoted spot
InstrumentId.from_str("BTC-USDC.OKX") # For USDC-quoted spotSWAP (perpetual swaps)
Format: {BaseCurrency}-{QuoteCurrency}-SWAP
Examples:
BTC-USDT-SWAP- Bitcoin perpetual swap (linear, USDT-margined)BTC-USD-SWAP- Bitcoin perpetual swap (inverse, coin-margined)ETH-USDT-SWAP- Ethereum perpetual swap (linear)ETH-USD-SWAP- Ethereum perpetual swap (inverse)
Linear vs inverse contracts:
- Linear (USDT-margined): Uses stablecoins like USDT as margin.
- Inverse (coin-margined): Uses the base cryptocurrency as margin.
FUTURES (dated futures)
Format: {BaseCurrency}-{QuoteCurrency}-{YYMMDD}
Examples:
BTC-USD-261225- Bitcoin futures expiring December 25, 2026ETH-USD-261225- Ethereum futures expiring December 25, 2026BTC-USD-270326- Bitcoin futures expiring March 26, 2027
Futures can be linear or inverse. The adapter derives this from OKX's ctType field.
SPREADS
Format: {Leg1InstrumentId}_{Leg2InstrumentId}
Examples:
BTC-USDT_BTC-USDT-SWAP- Spread between BTC-USDT spot and BTC-USDT perpetual swapETH-USD-SWAP_ETH-USD-261225- Spread between ETH-USD perpetual swap and dated future
Set load_spreads=True on the data client to load live OKX spread instruments from
the OKX Get Spreads (Public)
endpoint. The adapter maps each OKX sprdId to a Nautilus spread instrument ID
with the .OKX venue suffix.
Spread instrument notes:
- Spread market data streams on the OKX business WebSocket: quotes (
sprd-bbo-tbt), trades (sprd-public-trades), and 5-level book snapshots (sprd-books5). Spreads have no incremental book channel, so eachsprd-books5update is a full snapshot delivered through the order book subscription (flagged as a snapshot, not incremental L2 deltas). - The parser represents spot, swap, and futures leg combinations. It also represents option‑leg spread definitions when OKX returns them through the same spread endpoint.
- OKX option RFQ and block trading workflows are separate from the Nitro spread order book API and are not routed by this spread path.
OPTIONS
Format: {BaseCurrency}-{QuoteCurrency}-{YYMMDD}-{Strike}-{Type}
Examples:
BTC-USD-261225-100000-C- Bitcoin call option, $100,000 strike, expiring December 25, 2026BTC-USD-261225-100000-P- Bitcoin put option, $100,000 strike, expiring December 25, 2026ETH-USD-261225-4000-C- Ethereum call option, $4,000 strike, expiring December 25, 2026
Where:
C= Call optionP= Put option
EVENTS
OKX event contract instrument IDs use the market ID returned by the OKX instruments API.
The adapter represents these markets as Nautilus BinaryOption instruments.
Example:
BTC-ABOVE-DAILY-261224-1600-65000- Event contract market in theBTC-ABOVE-DAILYseries.
Common questions
Q: How do I know which contract type to use? A: Linear and inverse instruments have distinct symbols. The public Python configs do not expose a contract‑type filter, so the adapter loads both for the selected derivative instrument types.
Q: How do I load event contracts?
A: Use OKXInstrumentType.EVENTS. The public Python configs load all discoverable event contract
series and do not expose a series filter.
Retail price improvement (RPI)
Use Retail Price Improvement (RPI) to consume OKX's consolidated organic and RPI depth, place RPI maker orders, or let standard orders take RPI liquidity. The adapter maps these features to existing Nautilus order book, order, and lifecycle types. RPI routing is opt‑in, so standard subscriptions and orders remain unchanged.
RPI market data
Pass params={"rpi": True} to subscribe_book_deltas or
request_book_snapshot to use the public books-rpi channel or
GET /api/v5/market/books-rpi. The feed combines organic quantity with RPI quantity that is
available for execution.
Each raw depth level has the wire shape [price, totalQty, nonRpiQty, count]:
| Wire field | Rust type | Meaning |
|---|---|---|
price | Decimal | Price level. |
totalQty | Decimal | Organic and available RPI quantity. |
nonRpiQty | Decimal | Quantity available without RPI taker access. |
count | u64 | Aggregated order count at the price level. |
Nautilus OrderBookDeltas and OrderBook use totalQty as the level quantity. The typed raw
model retains nonRpiQty; the difference between the two quantities is the available RPI
liquidity.
WebSocket snapshots and updates retain seqId and prevSeqId. Emitted deltas carry seqId as
their sequence. The data client checks each update's prevSeqId against the last accepted seqId;
the values do not need to increase by one. On a mismatch, the client:
- Drops the mismatched frame.
- Suppresses later updates for that instrument.
- Replaces the subscription once to request a fresh snapshot.
- Resumes emission after a snapshot with
prevSeqId: -1.
If the snapshot does not arrive before the configured snapshot timeout, the book monitor logs a
warning and the client remains fail‑closed. The adapter applies the same linkage rule to standard
incremental OKX book channels when prevSeqId is present. books-rpi has no checksum.
For WebSocket subscriptions, rpi=True selects books-rpi instead of depth or VIP channel
selection. For REST snapshots, the requested depth becomes sz; OKX defaults to one level per side
and accepts up to 400.
The low‑level Rust clients expose:
- WebSocket:
OKXWebSocketClient.subscribe_book_rpiandunsubscribe_book_rpi. - REST:
OKXRawHttpClient.get_rpi_order_bookandOKXHttpClient.request_rpi_book_snapshot.
Public instrument responses expose the venue's RPI spacing thresholds:
| Wire field | Rust type | Instrument info key |
|---|---|---|
rpiMinLevel | Option<u64> | okx_rpi_min_level |
rpiMinPxBand | Option<Decimal> | okx_rpi_min_px_band |
rpiMinLevel counts organic price levels, while rpiMinPxBand measures basis points from the
opposite‑side organic best price. The info map stores the price band as its exact decimal string.
The adapter does not reject or round an order from these values because OKX applies the
authoritative instrument and account rules. Use rpi_px_round or handle the venue rejection.
RPI execution
Pass RPI controls through the submit_order, submit_order_list, or modify_order command
params. These controls work with HTTP and private WebSocket execution:
| Parameter | Type | Operations | Behavior |
|---|---|---|---|
rpi | bool | Place and batch place | Sends ordType: rpi; the Nautilus order must be LIMIT. |
rpi_taker_access | bool | Place and amend, single/batch | Lets a standard order take RPI liquidity. |
rpi_px_round | bool | Place and amend, single/batch | Lets OKX round an RPI maker price outward to an eligible level. |
order = strategy.order_factory.limit(
instrument_id=instrument_id,
order_side=OrderSide.SELL,
quantity=instrument.make_qty("250000"),
price=instrument.make_price("0.0001600"),
)
strategy.submit_order(
order,
params={
"rpi": True,
"rpi_px_round": True,
},
)Use rpi_taker_access only with regular limit, market, FOK, or IOC orders. When it is enabled,
OKX applies its taker speed bump to eligible orders, including post‑only orders. Use rpi_px_round
only on RPI maker orders. Omit inapplicable controls instead of passing False, because OKX can
reject unsupported combinations. Both controls default to false, and rpi_taker_access is not
inherited during an amendment. Repeat rpi_taker_access=True on every amendment that must retain
access.
The low‑level Rust clients expose the same single and batch matrix:
| Operation | REST method | WebSocket method |
|---|---|---|
| Place | place_order | submit_order |
| Batch place | place_orders | batch_submit_orders |
| Amend | amend_order | modify_order |
| Batch amend | amend_orders | batch_modify_orders |
The WebSocket batch amend tuple accepts an optional request ID and serializes it as reqId; it
does not replace the order's client ID.
RPI responses and lifecycle
Private order messages parse both ordType: rpi and the migration alias ordType: elp. If an
unfilled RPI placement first appears on the private order channel as state: canceled, with
accFillSz zero or empty, the adapter emits a post‑only order rejection without first emitting
acceptance. The fallback reason is RPI order canceled before acceptance. OKX can use this path
when an RPI price fails its spacing rule and rpiPxRound is false. Order reports represent RPI
orders as Nautilus LIMIT orders with post_only=True.
Use get_account_instruments to read the typed OKXRpiPermission value:
Disabledmaps torpi: "0".Enabledmaps torpi: "1"and does not grant permission to place RPI orders.Permittedmaps torpi: "2"and grants permission to place RPI orders.
The public instrument endpoint does not return account permissions. Raw fee responses expose
rpiMaker as an optional Decimal; an empty value means RPI is not applicable.
Responses may contain both RPI and ELP field names during the transition. The adapter prefers rpi
and rpiMaker, reads elp and elpMaker as response aliases, and sends only RPI names. Raw trade
messages describe source: "1" as an RPI order.
RPI exclusions
The adapter deliberately excludes the following:
- It does not expose obsolete
books-elpsubscriptions or emitordType: elp. - It does not treat the published RPI spacing thresholds as authoritative client‑side validation.
- It does not apply RPI controls to algo orders. The regular HTTP order path rejects RPI controls for spread orders.
- It does not add generic post‑only replay deduplication as part of RPI support.
OKX ignores rpiPxRound for options and event contracts.
See the OKX RPI migration changelog and RPI program guide.
Orders capability
Below are the order types, execution instructions, and time-in-force options supported for linear perpetual swap products on OKX.
WebSocket order identification
OKX WebSocket order operations use instIdCode (a numeric instrument identifier)
instead of the string instId parameter. The adapter resolves instIdCode values
from the instrument definitions fetched during startup and caches them for the
session lifetime. If the instrument cache is empty (e.g. because of a failed
bootstrap), order submissions fail with a clear error.
Client order ID requirements
OKX requires client order IDs to be alphanumeric (letters and numbers only) and at most
32 characters. Hyphens (-) are rejected, so set the following on your strategy config:
use_hyphens_in_client_order_ids = FalseNautilus client order IDs longer than 32 characters are also rejected. When you need UUID-based
identifiers, combine use_uuid_client_order_ids=True with use_hyphens_in_client_order_ids=False
so the generated value fits within the OKX limit.
Order types
| Order type | Linear perpetual swap | Notes |
|---|---|---|
MARKET | ✓ | Immediate execution at market price. |
MARKET_TO_LIMIT | ✓ | Market order converted to IOC limit. |
LIMIT | ✓ | Execution at specified price or better. |
STOP_MARKET | ✓ | Conditional market order through OKX algo orders. |
STOP_LIMIT | ✓ | Conditional limit order through OKX algo orders. |
MARKET_IF_TOUCHED | ✓ | Conditional market order through OKX algo orders. |
LIMIT_IF_TOUCHED | ✓ | Conditional limit order through OKX algo orders. |
TRAILING_STOP_MARKET | ✓ | Trailing stop market order through OKX advance algo orders. |
Conditional orders: STOP_MARKET, STOP_LIMIT, MARKET_IF_TOUCHED,
LIMIT_IF_TOUCHED, and TRAILING_STOP_MARKET use OKX algo orders. The
TRAILING_STOP_MARKET path uses OKX's advance algo order API (move_order_stop) and
requires the cancel-advance-algos endpoint for cancellation.
Spread orders
OKX spread instruments use a separate spread trading order book and API family. The
execution client routes spread orders by spread instrument ID, for example
ETH-USD-SWAP_ETH-USD-261225.OKX, through the HTTP /api/v5/sprd/* endpoints.
The adapter uses OKX's spread REST endpoints for submit, cancel, mass cancel, order
status, and trade reports. It subscribes to the OKX business WebSocket
sprd-orders channel
for live spread order updates.
OKX sprd-orders WebSocket updates do not include fee fields. Live spread fill
reports emitted from that channel use zero commission; historical and reconciliation
fill reports from the REST
sprd/trades endpoint
include OKX fee data.
Supported spread order instructions:
LIMITwith GTC time-in-force.LIMITwith IOC time-in-force.LIMITwith post-only execution.
Spread order lists, conditional orders, FOK time-in-force, and modify requests are not supported by the OKX spread trading API path.
Relevant OKX docs:
Execution instructions
| Instruction | Linear perpetual swap | Notes |
|---|---|---|
post_only | ✓ | Only for limit orders. |
reduce_only | ✓ | Only for derivatives. |
Time in force
| Time in force | Linear perpetual swap | Notes |
|---|---|---|
GTC | ✓ | Good Till Canceled. |
FOK | ✓ | Fill or Kill. |
IOC | ✓ | Immediate or Cancel. |
GTD | - | No native OKX order time‑in‑force. |
GTD (Good Till Date) time in force: OKX supports request expiry through expTime,
but that is a request timeout rather than a native order expiry instruction.
If you need GTD functionality, use Nautilus's strategy-managed GTD feature. It handles order expiration by canceling the order at the specified expiry time.
Batch operations
| Operation | Linear perpetual swap | Notes |
|---|---|---|
| Batch Submit | ✓ | Submit multiple orders in single request. |
| Batch Modify | ✓ | Modify multiple orders in single request. |
| Batch Cancel | ✓ | Cancel multiple orders in single request. |
Position management
| Feature | Linear perpetual swap | Notes |
|---|---|---|
| Query positions | ✓ | Real‑time position updates. |
| Position mode | ✓ | Net vs Long/Short mode (see below). |
| Leverage control | - | Not exposed by the execution client. |
| Margin mode | ✓ | Supports isolated and cross modes. |
Position modes
OKX supports two position modes for derivatives trading:
- Net mode (netting): One position per instrument. Buy and sell orders net against each other. This is the default and recommended mode for most traders.
- Long/Short mode (hedging): Separate long and short positions for the same instrument. This mode supports simultaneous long and short exposure.
Position mode applies account-wide. Set it through the OKX web or app interface, or with
OKXHttpClient.set_position_mode; the client configs do not set it. The adapter handles both
modes when reporting positions: in net mode it derives the position side from the signed
quantity, and in long/short mode it uses the posSide reported by OKX.
Trade modes and margin configuration
OKX's unified account system supports different trade modes for spot and derivatives. Configure the account mode first through the OKX web or app interface; the API cannot set it for the first time.
For account mode details, see the OKX Account Mode documentation.
Trade modes overview
The Python execution config selects trade modes as follows:
| Instrument | Trade mode | Configuration |
|---|---|---|
| Spot | cash | Automatic. |
| Derivative | isolated | Default, or margin_mode=OKXMarginMode.ISOLATED. |
| Derivative | cross | margin_mode=OKXMarginMode.CROSS. |
from nautilus_trader.adapters.okx import OKXExecClientConfig
from nautilus_trader.adapters.okx import OKXInstrumentType
from nautilus_trader.adapters.okx import OKXMarginMode
from nautilus_trader.model import AccountId
from nautilus_trader.model import TraderId
exec_config = OKXExecClientConfig(
trader_id=TraderId.from_str("TRADER-001"),
account_id=AccountId.from_str("OKX-001"),
instrument_types=[OKXInstrumentType.SWAP],
margin_mode=OKXMarginMode.CROSS,
)The public Python config does not expose spot margin selection, so spot orders use cash
mode. In a mixed spot and derivatives client, margin_mode applies to derivatives only.
Manual trade mode override: You can override the trade mode per order with
params={"td_mode": "..."}. This bypasses adapter selection and can lead to order
rejection when the value does not match the instrument type, such as isolated for
spot instruments.
Only use manual override for requirements that cannot be met through configuration.
Order querying
| Feature | Linear perpetual swap | Notes |
|---|---|---|
| Query open orders | ✓ | List all active orders. |
| Query order history | ✓ | Historical order data. |
| Order status updates | ✓ | Real‑time order state changes. |
| Trade history | ✓ | Execution and fill reports. |
Contingent orders
| Feature | Linear perpetual swap | Notes |
|---|---|---|
| Order lists | ✓ | Batch via WS; regular orders only. |
| OCO orders | - | Not submitted by OKXExecutionClient. |
| Bracket orders | - | Not submitted by OKXExecutionClient. |
| Conditional orders | ✓ | Stop and limit‑if‑touched orders. |
The low‑level HTTP client models OKX attached TP/SL and OCO payloads, but
OKXExecutionClient does not translate Nautilus OCO or bracket order lists into those payloads.
Conditional order architecture
Conditional orders (OKX algo orders) use a hybrid architecture:
- Submission: HTTP REST API (
/api/v5/trade/order-algo). - Status updates: WebSocket business endpoint (
/ws/v5/business) on theorders-algochannel. - Cancellation: HTTP REST API with algo order ID tracking.
This design ensures:
- Immediate submission acknowledgment through HTTP.
- Real-time status updates through WebSocket.
- Proper order lifecycle management with algo order ID mapping.
Supported conditional order types
| Order type | Trigger types | Notes |
|---|---|---|
STOP_MARKET | Last, Mark, Index | Market execution when triggered. |
STOP_LIMIT | Last, Mark, Index | Limit order placement when triggered. |
MARKET_IF_TOUCHED | Last, Mark, Index | Market execution when price touched. |
LIMIT_IF_TOUCHED | Last, Mark, Index | Limit order placement when price touched. |
TRAILING_STOP_MARKET | - | Callback ratio or spread; optional activation price. |
Trigger price types
Stop and touched orders support different trigger price sources:
- Last price (
TriggerType.LAST_PRICE): Uses the last traded price (default). - Mark price (
TriggerType.MARK_PRICE): Uses the mark price. - Index price (
TriggerType.INDEX_PRICE): Uses the underlying index price.
# Example: Stop loss using mark price trigger
stop_order = order_factory.stop_market(
instrument_id=instrument_id,
order_side=OrderSide.SELL,
quantity=Quantity.from_str("0.1"),
trigger_price=Price.from_str("45000.0"),
trigger_type=TriggerType.MARK_PRICE, # Use mark price for trigger
)
strategy.submit_order(stop_order)Risk management
Liquidation and ADL event handling
The OKX adapter detects exchange-initiated risk management events:
- Liquidation warnings: When
instrument_typesincludesMARGIN,SWAP,FUTURES, orOPTION, the execution client subscribes to theliquidation-warningchannel withinstType=ANYand logs a warning when OKX reports a position nearing liquidation. This is an early warning only: the position may already be liquidated by the time the message arrives, and the adapter surfaces it as a log message rather than a strategy‑facing event. - Liquidation orders: When the exchange liquidates a position, the adapter detects the liquidation category and logs warnings with order details. These orders continue through the normal order and fill pipeline.
- Auto-deleveraging (ADL): When OKX closes your position to offset a counterparty's liquidation, the adapter detects and logs the ADL event with position details.
Liquidation-order and ADL detection is driven by the category field on the order record. The
recognized values are:
category | Meaning |
|---|---|
full_liquidation | Full position liquidation. |
partial_liquidation | Partial position liquidation. |
adl | Auto‑deleveraging close. |
delivery | Contract delivery at expiry. |
normal / other values | Regular order flow. |
Category detection runs on both paths:
- WebSocket
orderschannel (live order and fill updates). - HTTP
GET /api/v5/trade/orders-history(used during reconciliation and cold-start mass status).
Liquidation and ADL events are logged at WARNING level with details including order ID, instrument, and state. Liquidation warnings instead log position side, size, margin ratio, mark price, and margin mode. Monitor these logs as part of your risk management process.
The adapter forwards these exchange‑generated orders as OrderStatusReport and FillReport
messages and sends position updates as PositionStatusReport messages. Because the orders are
untracked at dispatch time, this path does not emit strategy‑owned order events directly.
Upstream references:
- Order channel and
categoryfield - Liquidation warning channel
- Auto-Deleveraging mechanism
- Liquidation mechanism
Options trading
The OKX adapter supports trading options (OPTION instrument type) with some differences
from other derivatives. OKX options are inverse contracts settled in the underlying
cryptocurrency.
For full API details see the
OKX Options Trading documentation.
Supported order types
Only limit-style orders are supported. OKX does not allow market orders for options.
| Order type | Supported | Notes |
|---|---|---|
LIMIT | ✓ | Standard limit order. |
MARKET | - | Rejected by the adapter before reaching the API. |
MARKET_TO_LIMIT | - | Rejected by the adapter before reaching the API. |
Options support FOK and IOC time-in-force. OKX uses a dedicated op_fok order type for
options FOK orders; the adapter handles this mapping automatically.
Conditional/algo orders (STOP_MARKET, STOP_LIMIT, MARKET_IF_TOUCHED,
LIMIT_IF_TOUCHED, TRAILING_STOP_MARKET) are not supported for options and are denied.
Pricing modes
Options orders can be priced in three mutually exclusive ways. Pass the pricing mode via
order params:
| Mode | Parameter | Description |
|---|---|---|
| Price | (default) | Standard limit price in the contract's currency. |
| USD | px_usd | Price in USD terms. |
| IV | px_vol | Price in implied volatility (1.0 = 100%). |
# Price in USD
order = strategy.order_factory.limit(
instrument_id=InstrumentId.from_str("BTC-USD-261225-50000-C.OKX"),
order_side=OrderSide.BUY,
quantity=Quantity.from_int(1),
price=Price.from_str("0"), # Placeholder; px_usd takes precedence
params={"px_usd": "100.5"},
)
# Price in implied volatility
order = strategy.order_factory.limit(
instrument_id=InstrumentId.from_str("BTC-USD-261225-50000-C.OKX"),
order_side=OrderSide.BUY,
quantity=Quantity.from_int(1),
price=Price.from_str("0"), # Placeholder; px_vol takes precedence
params={"px_vol": "0.55"},
)When modifying an order, the same px_usd or px_vol params can be passed to the modify
command to amend the price in the original pricing mode.
Option Greeks
OKX publishes two parallel greek sets on the opt-summary channel:
- Black-Scholes (
BLACK_SCHOLES): Greeks denominated in USD. Matches the convention used by the Deribit and Bybit adapters. - Price-adjusted (
PRICE_ADJUSTED): Greeks denominated in the underlying coin units. Matches OKX's native contract convention.
By default the adapter emits both on every opt-summary tick. Each emitted OptionGreeks
carries a convention field set to GreeksConvention.BLACK_SCHOLES or
GreeksConvention.PRICE_ADJUSTED, so receivers can branch per message.
To narrow the stream, pass params["greeks_convention"] on subscribe:
- Single string:
"BLACK_SCHOLES"or"PRICE_ADJUSTED"(case-insensitive). - List of strings:
["BLACK_SCHOLES", "PRICE_ADJUSTED"]. - Omitted: adapter emits both.
Unknown entries log a warning and are skipped. If every requested entry is unknown, the adapter falls back to emitting both.
# Default (both conventions, receiver branches)
self.subscribe_option_greeks(instrument_id)
def on_option_greeks(self, greeks: OptionGreeks) -> None:
if greeks.convention == GreeksConvention.BLACK_SCHOLES:
self._handle_bs(greeks)
else:
self._handle_pa(greeks)# Single-convention narrowing
self.subscribe_option_greeks(
instrument_id,
params={"greeks_convention": "PRICE_ADJUSTED"},
)# Explicit list (equivalent to the default when both are listed)
self.subscribe_option_greeks(
instrument_id,
params={"greeks_convention": ["BLACK_SCHOLES", "PRICE_ADJUSTED"]},
)The data engine deduplicates option-greeks subscriptions by instrument_id, so if two actors
on one node subscribe to the same instrument with different single conventions only the first
one reaches the adapter. The second actor gets the first actor's convention set. Workaround:
either actor can subscribe without params (or with the full list) to receive both streams
and filter locally on greeks.convention.
Position Greeks
OKX position payloads include position‑level Black‑Scholes Greeks (delta_bs, gamma_bs,
theta_bs, and vega_bs). The adapter's standard PositionStatusReport does not expose these
fields. The opt-summary stream described above provides the adapter's exposed per‑instrument
Greeks.
Restrictions
reduce_onlyis not applicable to options and is automatically stripped.- Position side defaults to
Net.
Configuration
Option discovery requires at least one instrument_families value, for example BTC-USD.
Pass it to OKXDataClientConfig when loading options from Python. The public Python execution
config constructor does not expose this field, so selecting OKXInstrumentType.OPTION only on
OKXExecClientConfig skips option loading and logs a warning.
Event contracts
OKX exposes prediction market contracts through instType=EVENTS. The adapter loads
these instruments as Nautilus BinaryOption instruments and preserves OKX metadata
in the instrument info field under the keys series_id, inst_category,
inst_id_code, state, and rule_type.
Loading event contract instruments
Use OKXInstrumentType.EVENTS in the data or execution client config. The adapter requests the
event contract series list, then requests instruments for each series.
from nautilus_trader.adapters.okx import OKXDataClientConfig
from nautilus_trader.adapters.okx import OKXInstrumentType
data_config = OKXDataClientConfig(instrument_types=[OKXInstrumentType.EVENTS])Event contract market data
The low-level HTTP client exposes OKX's public event contract discovery endpoints:
request_event_contract_series.request_event_contract_events.request_event_contract_markets.
The low-level WebSocket client supports the event-contract-markets channel through
subscribe_event_contract_markets and unsubscribe_event_contract_markets. This
channel publishes market status and floor-strike generation updates, has no initial
snapshot, and does not include instId, so the adapter forwards it as raw venue JSON.
OKX's standard market data endpoints return YES-side data for EVENTS. Derive NO-side
prices from YES-side prices when a strategy needs both outcomes.
Event contract trading
Pass the OKX event outcome through order params when submitting event contract orders:
order = strategy.order_factory.limit(
instrument_id=InstrumentId.from_str("BTC-ABOVE-DAILY-261224-1600-65000.OKX"),
order_side=OrderSide.BUY,
quantity=Quantity.from_int(1),
price=Price.from_str("0.42"),
params={"outcome": "yes"},
)
strategy.submit_order(order)OKX requires outcome for EVENTS orders. It also requires speedBump=1 for
non-post-only event contract orders and amendments. The adapter validates outcome
before sending the order and defaults speedBump to 1 for non-post-only event
orders when it is not supplied.
Settlement fills arrive with OKX order category delivery. The adapter parses this
category during live order updates and reconciliation.
Upstream references:
Authentication
To use the OKX adapter, create API credentials in your OKX account:
- Log into your OKX account and navigate to the API management page.
- Create a new API key with the required permissions for trading and data access.
- Record your API key, secret key, and passphrase.
You can provide these credentials through environment variables:
export OKX_API_KEY="your_api_key"
export OKX_API_SECRET="your_api_secret"
export OKX_API_PASSPHRASE="your_passphrase"Or pass them directly in the configuration (not recommended for production).
Demo trading
OKX provides a demo trading environment for testing strategies without real funds.
Setting up a demo account
- Log into your OKX account at okx.com.
- Navigate to Trade > Demo Trading.
- Go to Personal Center within Demo Trading.
- Select Demo Trading API and create a new API key.
- Record your demo API key, secret key, and passphrase.
You can provide demo credentials through environment variables:
export OKX_API_KEY="your_demo_api_key"
export OKX_API_SECRET="your_demo_api_secret"
export OKX_API_PASSPHRASE="your_demo_passphrase"Configuration
Set environment=OKXEnvironment.DEMO in your client configuration:
from nautilus_trader.adapters.okx import OKXDataClientConfig
from nautilus_trader.adapters.okx import OKXEnvironment
data_config = OKXDataClientConfig(environment=OKXEnvironment.DEMO)When demo mode is enabled:
- REST API requests reuse the region's live host with the
x-simulated-trading: 1header. - WebSocket connections use demo endpoints (
wspap.okx.comfor the global region).
Demo API keys are separate from production keys. Create API keys for demo trading through the Demo Trading interface. Production API keys do not work in demo mode.
Regional endpoints
OKX serves distinct endpoints per region, and an API key is only valid against the region
where it was registered (using a key against another region's endpoints returns
API key doesn't exist). Set region to select the correct endpoint set:
| Region | Registered on | REST | WebSocket host |
|---|---|---|---|
GLOBAL | www.okx.com | www.okx.com | ws.okx.com |
EEA | my.okx.com | eea.okx.com | wseea.okx.com |
US | app.okx.com | us.okx.com | wsus.okx.com |
Despite its enum name, US also selects the endpoints for Australian accounts registered on
app.okx.com.
region defaults to GLOBAL. For example, an EEA account:
from nautilus_trader.adapters.okx import OKXDataClientConfig
from nautilus_trader.adapters.okx import OKXRegion
data_config = OKXDataClientConfig(region=OKXRegion.EEA)region selects the regional defaults, and combines with environment to pick the demo
hosts (for example wseeapap.okx.com for EEA demo). Explicit base_url_http and
base_url_ws overrides always take precedence over the region defaults.
Funding rates
The adapter receives funding rate data from the
Funding Rate Channel
WebSocket stream. OKX provides both fundingTime and nextFundingTime in each message,
and the adapter computes interval as the difference between these two values.
For historical funding rate requests, the adapter computes the interval from consecutive funding timestamps returned by the Get Funding Rate History endpoint.
Rate limiting
The adapter enforces OKX's per-endpoint quotas while keeping sensible defaults for REST and WebSocket calls.
OKX enforces per‑endpoint and per‑account quotas. A rate‑limited request returns OKX error code
50011; throttle requests on the affected key before retrying.
REST limits
Every request passes through an internal global bucket of 250 requests per second, plus the endpoint-specific bucket below. The endpoint quotas mirror OKX's published limits where available.
| Key / endpoint | Limit (req/sec) | Notes |
|---|---|---|
okx:global | 250 | Adapter‑level shared bucket. |
/api/v5/account/set-position-mode | 2 | OKX 5 requests / 2 seconds, rounded down. |
/api/v5/account/balance | 5 | OKX 10 requests / 2 seconds. |
/api/v5/account/trade-fee | 2 | OKX 5 requests / 2 seconds, rounded down. |
/api/v5/account/instruments | 10 | OKX 20 requests / 2 seconds. |
/api/v5/account/positions | 5 | OKX 10 requests / 2 seconds. |
/api/v5/account/positions-history | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/instruments | 10 | OKX 20 requests / 2 seconds. |
/api/v5/public/position-tiers | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/event-contract/series | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/event-contract/events | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/event-contract/markets | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/opt-summary | 10 | OKX 20 requests / 2 seconds. |
/api/v5/public/price-limit | 10 | OKX 20 requests / 2 seconds. |
/api/v5/public/time | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/mark-price | 5 | OKX 10 requests / 2 seconds. |
/api/v5/public/funding-rate-history | 5 | OKX 10 requests / 2 seconds. |
/api/v5/market/index-tickers | 10 | OKX 20 requests / 2 seconds. |
/api/v5/market/books | 20 | OKX 40 requests / 2 seconds. |
/api/v5/market/books-rpi | 20 | Adapter bucket; OKX publishes 20 / 2 sec. |
/api/v5/market/candles | 20 | OKX 40 requests / 2 seconds. |
/api/v5/market/history-candles | 10 | OKX 20 requests / 2 seconds. |
/api/v5/market/history-trades | 10 | OKX 20 requests / 2 seconds. |
/api/v5/sprd/spreads | 10 | OKX 20 requests / 2 seconds. |
/api/v5/sprd/order | 10 | OKX 20 requests / 2 seconds. |
/api/v5/sprd/cancel-order | 10 | OKX 20 requests / 2 seconds. |
/api/v5/sprd/mass-cancel | 5 | OKX 10 requests / 2 seconds. |
/api/v5/sprd/orders-pending | 5 | OKX 10 requests / 2 seconds. |
/api/v5/sprd/orders-history | 10 | OKX 20 requests / 2 seconds. |
/api/v5/sprd/trades | 10 | OKX 20 requests / 2 seconds. |
/api/v5/trade/order | 30 | OKX 60 requests / 2 seconds. |
/api/v5/trade/batch-orders | 7 | OKX 300 orders / 2 seconds, rounded down. |
/api/v5/trade/amend-order | 30 | OKX 60 requests / 2 seconds. |
/api/v5/trade/amend-batch-orders | 7 | OKX 300 orders / 2 seconds, rounded down. |
/api/v5/trade/cancel-batch-orders | 7 | OKX 300 orders / 2 seconds, rounded down. |
/api/v5/trade/orders-pending | 30 | OKX 60 requests / 2 seconds. |
/api/v5/trade/orders-history | 20 | OKX 40 requests / 2 seconds. |
/api/v5/trade/fills | 30 | OKX 60 requests / 2 seconds. |
/api/v5/trade/order-algo | 10 | OKX 20 requests / 2 seconds. |
/api/v5/trade/cancel-algos | 1 | OKX 20 orders / 2 seconds. |
/api/v5/trade/cancel-advance-algos | 1 | Conservative bucket, see below. |
/api/v5/trade/amend-algos | 10 | OKX 20 requests / 2 seconds. |
/api/v5/trade/orders-algo-pending | 10 | OKX 20 requests / 2 seconds. |
/api/v5/trade/orders-algo-history | 10 | OKX 20 requests / 2 seconds. |
All keys include the okx:global bucket. URLs are normalized with query strings removed
before rate limiting, so requests with different filters share the same quota.
The adapter's /api/v5/market/books-rpi bucket is 20 requests per second, while OKX publishes
20 requests per 2 seconds. The venue limit remains authoritative, so callers should keep RPI book
snapshot traffic within the published quota.
For order‑based batch quotas, the adapter uses request‑level buckets that assume full
batch sizes: 20 orders per request for regular batch operations and 10 orders per
request for algo cancels. OKX's public docs do not list a rate limit for
/api/v5/trade/cancel-advance-algos, so the adapter applies a conservative bucket; the HTTP
client calls that endpoint to cancel advance algo orders such as trailing stops.
WebSocket limits
- Connection establishment: 3 requests per second (per IP).
- Subscription operations (subscribe/unsubscribe/login): 480 requests per hour per connection.
Order operation buckets mirror OKX's published limits where available.
| Operation key | Limit (req/sec) | Notes |
|---|---|---|
order | 30 | OKX 60 requests / 2 seconds. |
cancel | 30 | OKX 60 requests / 2 seconds. |
amend | 30 | OKX 60 requests / 2 seconds. |
batch-order | 7 | OKX 300 orders / 2 seconds, rounded down for full batches. |
batch-cancel | 7 | OKX 300 orders / 2 seconds, rounded down for full batches. |
batch-amend | 7 | OKX 300 orders / 2 seconds, rounded down for full batches. |
mass-cancel | 2 | OKX 5 requests / 2 seconds, rounded down. |
algo-order | 10 | OKX 20 requests / 2 seconds. |
algo-cancel | 1 | OKX 20 orders / 2 seconds, rounded down for full batches. |
See the OKX rate limit documentation.
Configuration
Data client
The OKX data client provides the following Python configuration options.
| Option | Default | Description |
|---|---|---|
instrument_types | [OKXInstrumentType.SPOT] | OKX instrument types to load. |
instrument_families | None | Required for options (BTC-USD); filters futures, swaps, and events when set. |
load_spreads | False | Loads live spread instruments. |
base_url_http | None | Override for the OKX REST endpoint. |
base_url_ws_public | None | Override for the public WebSocket URL. |
base_url_ws_business | None | Override for the business WebSocket URL. |
api_key | None | Falls back to OKX_API_KEY when unset. |
api_secret | None | Falls back to OKX_API_SECRET when unset. |
api_passphrase | None | Falls back to OKX_API_PASSPHRASE. |
environment | LIVE | Environment enum (LIVE or DEMO). |
region | GLOBAL | Region enum (GLOBAL, EEA, or US). |
http_timeout_secs | 60 | REST market data request timeout. |
max_retries | 3 | Retry attempts for recoverable REST errors. |
retry_delay_initial_ms | 1,000 | Initial delay before retrying. |
retry_delay_max_ms | 10,000 | Maximum exponential backoff delay. |
update_instruments_interval_mins | 60 | Background instrument refresh interval. |
book_stale_check_interval_secs | 5 | Stale book check interval. |
book_stale_threshold_secs | 30 | Idle time before a stale book warning. |
book_snapshot_timeout_secs | 3 | Post‑reconnect snapshot wait. |
vip_level | None | Enables higher‑depth books by VIP tier. |
proxy_url | None | Optional HTTP and WebSocket proxy URL. |
transport_backend | Sockudo | WebSocket transport backend. |
Set book_stale_check_interval_secs, book_stale_threshold_secs, or
book_snapshot_timeout_secs to 0 to disable that health monitor. Quiet markets can idle
without book updates; increase book_stale_threshold_secs for sparse instruments.
Supported data client instrument_types values are SPOT, MARGIN, SWAP,
FUTURES, OPTION, and EVENTS. See Options trading before selecting
OPTION from Python.
Spread instruments use load_spreads instead of instrument_types because OKX serves them from
/api/v5/sprd/spreads.
Execution client
The OKX execution client provides the following Python configuration options.
| Option | Default | Description |
|---|---|---|
instrument_types | [OKXInstrumentType.SPOT] | Tradable OKX instrument types. |
load_spreads | False | Loads live spread instruments. |
trader_id | Required | Nautilus trader ID for the client. |
account_id | Required | Nautilus account ID for the client. |
base_url_http | None | Override for the OKX trading REST endpoint. |
base_url_ws_private | None | Override for the private WebSocket URL. |
base_url_ws_business | None | Override for the business WebSocket URL. |
api_key | None | Falls back to OKX_API_KEY when unset. |
api_secret | None | Falls back to OKX_API_SECRET when unset. |
api_passphrase | None | Falls back to OKX_API_PASSPHRASE. |
environment | LIVE | Environment enum (LIVE or DEMO). |
region | GLOBAL | Region enum (GLOBAL, EEA, or US). |
margin_mode | None | Margin mode (ISOLATED or CROSS). |
http_timeout_secs | 60 | REST trading request timeout. |
max_retries | 3 | Retry attempts for recoverable REST errors. |
retry_delay_initial_ms | 1,000 | Initial delay before retrying. |
retry_delay_max_ms | 10,000 | Maximum exponential backoff delay. |
auth_timeout_secs | None | Override WebSocket authentication timeout. |
proxy_url | None | Optional HTTP and WebSocket proxy URL. |
transport_backend | Sockudo | WebSocket transport backend. |
Supported execution client instrument_types values are SPOT, MARGIN, SWAP,
FUTURES, OPTION, and EVENTS. See Options trading before selecting
OPTION from Python.
Spread instruments use OKX spread IDs instead of instrument_types; load them with
load_spreads=True on the data and execution clients before trading them.
Manual endpoint overrides
Setting region (see Regional endpoints) selects the correct EEA or
US endpoints automatically, which is the recommended approach. The explicit base_url_*
overrides below remain available for proxies, custom routing, or endpoints not covered by a
region; they take precedence over the region default. The EEA bases are shown as an example.
| Config field | Live base | Demo base | WebSocket path |
|---|---|---|---|
base_url_http | https://eea.okx.com | https://eea.okx.com | |
base_url_ws_public | wss://wseea.okx.com:8443 | wss://wseeapap.okx.com:8443 | /ws/v5/public |
base_url_ws_private | wss://wseea.okx.com:8443 | wss://wseeapap.okx.com:8443 | /ws/v5/private |
base_url_ws_business | wss://wseea.okx.com:8443 | wss://wseeapap.okx.com:8443 | /ws/v5/business |
For WebSocket fields, join the base and path in the same row.
Use base_url_ws_public with data client configs and base_url_ws_private with execution client
configs. When overriding either WebSocket URL, also set base_url_ws_business because the adapter
does not derive a custom business WebSocket URL from the other override.
See the OKX EEA API documentation for the current official endpoint list.
Use OKXDataClientConfig with OKXDataClientFactory and OKXExecClientConfig with
OKXExecutionClientFactory. The Python examples show a complete
LiveNode.builder(...) configuration for data and execution clients.
Contributing
For additional features or to contribute to the OKX adapter, please see our contributing guide.
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