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Order Cancel Reject(9) is issued by the exchange upon receipt of Order Cancel Request(F) message which cannot be executed. Alongside tags listed below, Order Cancel Reject(9) also sends corresponding tag (ClOrdID, OrigClOrdId or DeribitLabel), used by the user to cancel the order in Order Cancel Request(F) or Order Cancel/Replace Request(G).

Response on success

The following Execution Report(8) is sent by the exchange upon successfully processing a cancel request. This brief Execution Report comes faster and just indicates that the order was cancelled. Besides this brief report, the server always sends the last state of the cancelled order as another Execution Report with Text=“notification” and all details about the cancelled order.

MMP orders: if the Market Maker Protection (MMP) order was cancelled by user request the DeribitMMProtection (9008) flag is removed from the notification Execution Report. Presence of the DeribitMMProtection (9008) flag in the Execution Report with status “cancelled”

means that the order has been cancelled by Market Maker Protection (MMP).