Exchange-Bound Messages

New Order Single <D> (LIMIT)

To submit a new limit order to Gemini, send a New Order Single <D> message with OrdType Limit.

Gemini will respond to a New Order Single <D> message with an Execution Report <8>. See Execution Report <8> for examples.

If Gemini receives a New Order Single <D> message with the PossResend <97> flag set to Y in the header, that order will be rejected with Business Message Reject <j>.

Fields

Tag	Name	Req	Description
	Standard Header	Y	MsgType = `D`
11	ClOrdID	Y	Unique identifier of the order as assigned by the institution. Uniqueness must be guaranteed by the institution for the duration of the connection to the order entry channel.
23	IOIID	N*	Unique identifier of an IOI. *Required when responding to an IOI.
18	ExecInst	N	Used for specific execution options in combination with TimeInForce `<59>`. `6 = Participate don't initiate` (denotes maker-or-cancel when combined with TimeInForce value `1 = Good Till Cancel (GTC)`)
38	OrderQty	Y	Decimal quantity. Full quantity will be visible on the book.
110	MinQty	N*
40	OrdType	Y	Order type. Valid values: `2 = Limit`
44	Price	Y	Decimal price. Price is required when OrdType `<40>` is `2 = Limit`.
54	Side	Y	Side of the order. Valid values: `1 = Buy` `2 = Sell`
55	Symbol	Y	Ticker symbol of the order. See Supported Symbols for valid values.
59	TimeInForce	Y	Specifies how long the order remains in effect. Valid values: `1 = Good Till Cancel (GTC)` `3 = Immediate Or Cancel (IOC)` `4 = Fill Or Kill (FOK)`
60	TransactTime	Y	Time of order creation (expressed in UTC).
544	CashMargin	N	Identifies whether order is a margin order or a non-margin order. Valid values: `1 = Cash` `2 = Margin Open` This field is optional. If not provided, the order is assumed to be a non-margin (cash) order. Only accounts enabled for spot margin trading can specify margin orders. `3 = Margin Close` is not supported. Restriction: This field is only supported for buy orders (Side=1). Specifying this field on sell orders (Side=2) will result in a reject with error message: "CashMargin <544> not supported for sell orders".
	Standard Trailer	Y

Last modified on December 3, 2025

Identifiers assigned by Gemini New Order Single <D> (MARKET)

Tag

Name

Req

Description

Standard Header

MsgType = D

ClOrdID

Unique identifier of the order as assigned by the institution. Uniqueness must be guaranteed by the institution for the duration of the connection to the order entry channel.

IOIID

Unique identifier of an IOI.

*Required when responding to an IOI.

ExecInst

Used for specific execution options in combination with TimeInForce <59>.

6 = Participate don't initiate (denotes maker-or-cancel when combined with TimeInForce value 1 = Good Till Cancel (GTC))

OrderQty

Decimal quantity. Full quantity will be visible on the book.

110

MinQty

OrdType

Order type.

Valid values:

2 = Limit

Price

Decimal price.

Price is required when OrdType <40> is 2 = Limit.

Side

Side of the order.

Valid values:

1 = Buy

2 = Sell

Symbol

Ticker symbol of the order.

See Supported Symbols for valid values.

TimeInForce

Specifies how long the order remains in effect.

Valid values:

1 = Good Till Cancel (GTC)

3 = Immediate Or Cancel (IOC)

4 = Fill Or Kill (FOK)

TransactTime

Time of order creation (expressed in UTC).

544

CashMargin

Identifies whether order is a margin order or a non-margin order.

Valid values:

1 = Cash

2 = Margin Open

This field is optional. If not provided, the order is assumed to be a non-margin (cash) order.

Only accounts enabled for spot margin trading can specify margin orders.

3 = Margin Close is not supported.

Restriction: This field is only supported for buy orders (Side=1). Specifying this field on sell orders (Side=2) will result in a reject with error message: "CashMargin <544> not supported for sell orders".

Standard Trailer