The Amend Order <G> message is used to amend an existing order.

Tag	Field Name	Data Type	Req’d	Comments
Standard header			Y	MsgType `35=G`
11	ClOrdID	string	Y	Unique identifier of the order as assigned by client.
41	OrigClOrdID	string	Y	ClOrdID `<11>` of the existing order that the amend request want to execute.
37	OrderID	string	N	Unique identifier for Order as assigned by the Exchange.
44	Price	float	C	Price per unit of quantity (e.g. per 1 BTC coin). Not specified for Market orders (`40=1`).
38	OrderQty	float	Y	Quantity to trade.
40	OrdType	int	Y	Order type. Valid values: `1` - Market `2` - Limit
54	Side	int	Y	Side of order. Valid values: `1` - Buy `2` - Sell
55	Symbol	string	Y	Currency-pair.
59	TimeInForce	int	N	Specifies how long the order remains in effect before its expiry . Valid values: `0` - Day `1`- Good Till Cancel (GTC) `3` - Immediate or Cancel (IOC) `4` - Fill or Kill (FOK) `6` - Good Till Date (GTD) NOTES: Exchange will convert to Day automatically if invalid value detected. For market orders, TimeInForce will be ignored. A Day order will expire after 23:59:59 UTC of the same day it was posted on.
60	TransactTime	timestamp	Y	Time of execution/order creation in UTC i.e. yyyyMMdd-hh:mm:ss:xxx
110	MinQty	float	N	Minimum quantity of the order to be executed.
111	MaxFloor	float	N	Maximum quantity within the order to be shown on the exchange at any given time.
453	NoPartyIDs	int	N	A repeating group (↺) which should contain unique combinations of below tags: PartyID `<448>` PartyIDSource `<447>` PartyRole`<452>`
↺ 448	PartyID	string	C	Party identifier/code. It can be an Exchange firm name or user unique identifier that is the same as Tag `<1>`. e.g. XXXX_GROUP.
↺ 447	PartyIDSource	string	N	Identifies class or source of PartyID `<448>` Valid value: `D` = Proprietary/Custom code
↺ 452	PartyRole	int	N	Identifies the type of PartyID `<448>` Valid values: `1` = Executing Firm `12` = Executing Trader
Standard trailer			Y