OrderDenied

OrderDenied represents an order having been denied by the Nautilus system. The ExecutionEngine applies it to the order, updates the Cache, and publishes it on the MessageBus. It fires when an otherwise valid order cannot be submitted, for example due to a risk limit or an unsupported feature.

Typical transition: INITIALIZED -> DENIED. Handler: on_order_denied.

Fields

Beyond the common Python order event fields, OrderDenied carries:

Example

Reading the event in a strategy handler:

def on_order_denied(self, event: OrderDenied) -> None:
    self.log.warning(f"Order {event.client_order_id} denied: {event.reason}")

Related guides

• Events - Event categories, dispatch, and the common order event fields.
• Execution - Risk checks and order denied reasons.
• Orders - Order types and the state machine.