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Requests cancellation of an existing order.

CLI

HTTP

The order ID must be 1 to 128 characters.

Response

Success returns HTTP 202 with the standard envelope. data contains order_id and accepted. accepted: true acknowledges the cancellation request; it does not confirm the final CANCELLED order status. Query Get order afterward. Possible errors include order_not_found, order_not_cancellable, invalid_trade_date, and broker rejection.