Standard header, with 35=F.

The unique ID of the last non-cancelled order assigned by the client. Notice that the maximum size of this tag is 58 bytes.

The unique ID of the order, as returned to the client in the Execution Report in the OrderId field (37).

The unique ID of the cancel request as assigned by the client. Note: This is not the ClOrdID of the order being cancelled, but rather an identifier of the cancel request. However, much like a Cancel/Replace request, from this point onward, the ClOrdID (11) in all following execution reports Execution Report (35=8) will be the value from this field. In essence, this Order to perform a Cancel will replace the previous Order. Notice that the maximum size of this tag is 58 bytes.

The same as in the original order.

The same as in the original order.

UTCTimestamp of the request from the client.

The quantity being cancelled. This must be the total remaining quantity in the order.

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