OrderPendingUpdate

OrderPendingUpdate represents a ModifyOrder command having been sent to the trading venue. The ExecutionEngine applies it to the order, updates the Cache, and publishes it on the MessageBus. It fires when the system dispatches a modify request and awaits venue acknowledgement.

Transition: ACCEPTED -> PENDING_UPDATE. Handler: on_order_pending_update.

Fields

OrderPendingUpdate carries only the common order event fields. On this event, venue_order_id and account_id are usually populated but may be None, and reconciliation carries a real value.

Example

Reading the event in a strategy handler:

def on_order_pending_update(self, event: OrderPendingUpdate) -> None:
    self.log.info(f"Modify pending for {event.client_order_id}")

Related guides

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