Cancel Order

### Cancel a working order. **Available to:** All authenticated users **Environments:** Demo, Live **[Rate Limit](/api/authentication#request-rate-limits-and-time-penalties):** No endpoint-specific limit Requests cancellation of a working order, identified by its `orderId`. As with other order commands, success isn't guaranteed — the order may already have filled or been cancelled. When the request is rejected, the response carries a `failureReason` and `failureText`. **Common Failure Scenarios** - The order already filled or was cancelled (`TooLate`). - Another command for the order is still being processed (`AnotherCommandPending`). **Error Messages** | `failureReason` | Trigger | |-----------------|---------| | `TooLate` | The order already filled or was cancelled. | | `AnotherCommandPending` | A previous command for this order hasn't completed. | See the `failureReason` enum in the response schema for the complete list of values.