OrderRejected

OrderRejected represents an order having been rejected by the trading venue. The ExecutionEngine applies it to the order, updates the Cache, and publishes it on the MessageBus. It fires when the venue rejects the submitted order.

Typical transition: SUBMITTED -> REJECTED. Handler: on_order_rejected.

Fields

Beyond the common Python order event fields, OrderRejected carries:

Field	Python type	Required/default	Description
`account_id`	`AccountId`	Required	The account associated with the order.
`reason`	`str`	Required	The order rejection reason.
`due_post_only`	`bool`	`False`	If rejected because it was post‑only and would execute immediately as a taker.
`reconciliation`	`bool`	Required	If generated during reconciliation.

Example

Reading the event in a strategy handler:

def on_order_rejected(self, event: OrderRejected) -> None:
    self.log.warning(f"Order {event.client_order_id} rejected: {event.reason}")

Events - Event categories, dispatch, and the common order event fields.
Orders - Order types and the state machine.

OrderRejected

Fields

Example

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