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REST API EndpointsOrders

Cancel Order

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Cancel a working order.

Available to: All authenticated users

Environments: Demo, Live

Rate Limit: 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

failureReasonTrigger
TooLateThe order already filled or was cancelled.
AnotherCommandPendingA previous command for this order hasn’t completed.

See the failureReason enum in the response schema for the complete list of values.

Authentication

AuthorizationBearer

Bearer authentication of the form Bearer <token>, where token is your auth token.

Request

This endpoint expects an object.
orderIdlongRequired
clOrdIdstringOptional<=64 characters
activationTimedatetimeOptional
customTag50stringOptional<=64 characters

Operator ID for the order. Send it only if NinjaTrader configured an allow-list of operator IDs for your user. In that case it’s required on every order and must exactly match one approved value. If no allow-list is configured, omit it: a supplied value is denied. Organizations using passthrough also omit it, and NinjaTrader fills it in. Up to 64 characters. See Operator ID (customTag50) and Passthrough.

isAutomatedbooleanOptional

Response

CommandResult
failureReasonenumOptional
AccountClosed, AdvancedTrailingStopUnsupported, AnotherCommandPending, BackMonthProhibited, ExecutionProviderNotConfigured, ExecutionProviderUnavailable, HomeStateRestricted, InvalidContract, InvalidPrice, KeyInformationDocumentRequired, LiquidationOnly, LiquidationOnlyBeforeExpiration, MaxOrderQtyIsNotSpecified, MaxOrderQtyLimitReached, MaxPosLimitMisconfigured, MaxPosLimitReached, MaxTotalPosLimitReached, MinTradeDurationNotElapsed, MultipleAccountPlanRequired, NoQuote, NotEnoughLiquidity, OtherExecutionRelated, ParentRejected, RiskCheckTimeout, SSFNFAComplianceRequired, SSFNFAComplianceRequiredJointOnly, SSFRiskDisclosureAcknowledgmentRequired, SessionClosed, Success, TooLate, TradingLocked, TrailingStopNonOrderQtyModify, Unauthorized, UnknownReason, Unsupported
failureTextstringOptional<=8192 characters
commandIdlongOptional