The Order Cancel Request message is used to cancel an existing order with remaining quantity.

Tag	Field Name	Data Type	Req’d	Comments
Standard header			Y	MsgType `35=F`
11	ClOrdID	string	Y	The value of ClOrdID `<11>` referred in the corresponding OrderCancelRequest (`35=F`) or OrderCancelReplaceRequest (`35=G`).
41	OrigClOrdID	string	Y	ClOrdID `<11>` of the existing order that the cancel request want to execute.
37	OrderID	string	N	Unique identifier for Order as assigned by the Exchange.
38	OrderQty	float	Y	Quantity to trade.
54	Side	int	Y	Side of order. Valid values: `1` - Buy `2` - Sell
55	Symbol	string	Y	Currency-pair.
60	TransactTime	timestamp	Y	Time of execution/order creation in UTC i.e. yyyyMMdd-hh:mm:ss:xxx
Standard trailer			Y