Order Entry

New Order Single (35=D)

Used to submit a new order to the Exchange.

Tag	Name	Type	Required	Description
11	ClOrdID	String	Y	Client order ID for idempotency. UUID preferred, max 64 chars. Must not match any open order.
18	ExecInst	Char	N	`6`=Post Only
38	OrderQty	Decimal	Y	Quantity of contracts. Fractional quantities supported.
40	OrdType	Char	Y	`2`=Limit
44	Price	Integer	Y	Price per contract in cents (1–99).
54	Side	Char	Y	`1`=Buy (Yes), `2`=Sell (No)
55	Symbol	String	Y	Market ticker (e.g. `EURUSD-23JUN2618-B1.087`)
100	ExDestination	Integer	N	Exchange index. On event-contract sessions, omit or use `-1` to auto-route by market ticker. Margined sessions always route to index `0`.
59	TimeInForce	Char	N	`0`=Day (expires 11:59:59.999pm ET), `1`=GTC, `3`=IOC, `4`=FOK, `6`=GTD. Past GTD dates are treated as IOC.
126	ExpireTime	UTCTimestamp	C	Required when TimeInForce=GTD.
117	QuoteId	UUID	N	Quote to accept when using NewOrderSingle for an RFQ quote acceptance.
448	PartyID	UUID	N	FCM only. Sub-account identifier.
452	PartyRole	Integer	N	FCM only. `24`=Customer Account. Required when using PartyID.
453	NoPartyIDs	Integer	N	FCM only. Number of parties (only 1 supported).
79	AllocAccount	Integer	N	Subaccount number (0–63). Alternative to NoPartyIDs.
526	SecondaryClOrdID	UUID	N	Order group identifier.
2964	SelfTradePreventionType	Integer	N	`1`=Taker At Cross (default), `2`=Maker
21006	CancelOrderOnPause	Boolean	N	Cancel order if trading is paused.
21009	MaxExecutionCost	Decimal	N	Max execution cost in dollars. Order canceled if unable to fill within cost.
21023	RfqId	UUID	N	Server-assigned RFQ ID when using NewOrderSingle to accept an RFQ quote. If provided, the quote must belong to this RFQ.

8=FIXT.1.1|9=200|35=D|34=5|52=20230809-12:34:56.789|49=your-api-key|56=KalshiNR|
11=550e8400-e29b-41d4-a716-446655440000|38=10|40=2|54=1|55=HIGHNY-23DEC31|44=75|
59=1|10=123|

Order Cancel/Replace Request (35=G)

Used to modify an existing order without canceling it.

Supported Modifications

OrderQty: Increases or decreases the quantity of your order, note that increasing the quantity for the same point means forfeiting your queue position
Price: Changes the limit price of your order

Tag	Name	Type	Required	Description
11	ClOrdID	String	Y	Unique modification request ID. UUID preferred, max 64 chars.
37	OrderID	String	N	Exchange-assigned order identifier.
38	OrderQty	Decimal	Y	New total quantity. If equal to filled qty, order is canceled. If less, rejected.
40	OrdType	Char	Y	`2`=Limit
41	OrigClOrdID	String	Y	ClOrdID of the order to modify.
44	Price	Integer	N	New price in cents (1–99). Required if changing price.
54	Side	Char	Y	Must match original order.
55	Symbol	String	Y	Must match original order.
100	ExDestination	Integer	N	Exchange index. On event-contract sessions, omit or use `-1` to auto-route by `Symbol`. Margined sessions always route to index `0`.
448	PartyID	UUID	N	FCM only. Must match original order.
452	PartyRole	Integer	N	FCM only. `24`=Customer Account. Must match original order. Required when using PartyID.
453	NoPartyIDs	Integer	N	FCM only. Must match original order (only 1 supported).
79	AllocAccount	Integer	N	Subaccount number (0–63). Must match original order.

Order Cancel Request (35=F)

Cancel all remaining quantity of an existing order.

Tag	Name	Type	Required	Description
11	ClOrdID	String	Y	Unique cancel request ID. UUID preferred, max 64 chars.
37	OrderID	String	N	Exchange-assigned order identifier.
41	OrigClOrdID	String	Y	ClOrdID of the order to cancel.
54	Side	Char	Y	Must match original order.
55	Symbol	String	Y	Must match original order.
100	ExDestination	Integer	N	Exchange index. On event-contract sessions, omit or use `-1` to auto-route by market ticker. Margined sessions always route to index `0`.
448	PartyID	UUID	N	FCM only. Must match original order.
452	PartyRole	Integer	N	FCM only. `24`=Customer Account. Must match original order. Required when using PartyID.
453	NoPartyIDs	Integer	N	FCM only. Must match original order (only 1 supported).
79	AllocAccount	Integer	N	Subaccount number (0–63). Must match original order.

Execution Report (35=8)

Sent by the exchange to reflect order state changes.

Tag	Name	Type	Required	Description
6	AvgPx	Decimal	Y	Average price of all fills on this order.
11	ClOrdID	String	Y	ClOrdID from the last message that changed the order.
14	CumQty	Decimal	Y	Total quantity filled so far.
17	ExecID	String	Y	Unique report ID, sequenced within an exchange index. Format: `clock;event` for exchange index `0` (e.g. `4;7`) and `clock;event;exchange_index` for other indexes (e.g. `4;7;1`). `"-1;-1"` for PENDING reports.
30	LastMkt	String	C	Exchange index that produced the report.
31	LastPx	Integer	C	Fill price in cents. Present only for ExecType=Trade.
32	LastQty	Decimal	C	Fill quantity. Present only for ExecType=Trade.
37	OrderID	String	Y	Exchange-assigned order identifier.
38	OrderQty	Decimal	Y	Total order quantity. OrderQty = CumQty + LeavesQty.
39	OrdStatus	Char	Y	Current order status. See Order Status below.
41	OrigClOrdID	String	C	Previous ClOrdID. Present for Replaced/Canceled orders.
44	Price	Integer	C	Price per contract in cents.
54	Side	Char	Y	`1`=Buy (Yes), `2`=Sell (No)
55	Symbol	String	Y	Market ticker.
58	Text	String	N	Human-readable result description. See Text Field Values below.
60	TransactTime	UTCTimestamp	C	Timestamp of the triggering event.
103	OrdRejReason	Integer	C	Rejection reason. Present when ExecType=Rejected. See below.
126	ExpireTime	UTCTimestamp	C	Expiration timestamp. 11:59pm ET for Day orders.
150	ExecType	Char	Y	Report reason. See Execution Types below.
151	LeavesQty	Decimal	Y	Remaining quantity open for execution.
448	PartyID	UUID	N	FCM only. Sub-account identifier.
452	PartyRole	Integer	N	FCM only. `24`=Customer Account. Present when PartyID is present.
453	NoPartyIDs	Integer	N	FCM only. Number of parties (only 1 supported).
79	AllocAccount	Integer	C	Subaccount number (0–63). Present if order was placed for a subaccount.

Order Status (39)

New<0>: Active order, no fills
Partially Filled<1>: Some quantity filled
Filled<2>: Completely filled
Canceled<4>: Canceled (may have partial fills)
Replaced<5>: Order modified via Cancel/Replace
Pending Cancel<6>: Cancel pending
Rejected<8>: Order rejected
Pending New<A>: Order pending acceptance
Expired<C>: Time in force expired
Pending Replace<E>: Modification pending

By default, expiry-style system cancellations are reported as Canceled<4>.
If Logon tag 21012 (UseExpiredOrdStatus)=Y, expiry-style system cancellations (CloseCancel and OrderExpiryCancel) are reported as Expired<C>.

Order Rejection Reasons (103)

Unknown symbol<1>
Exchange closed<2>
Order exceeds limit<3>
Too late to enter<4>
Duplicate order<6>
Stale order<8>
Unsupported order characteristic<11>
Incorrect quantity<13>
Unknown account<15>
Other<99>

Execution Types (150)

New<0>: Order accepted
Trade<F>: Order filled (partial or complete)
Canceled<4>: Order canceled
Replaced<5>: Order modified
Rejected<8>: Order rejected
Expired<C>: Order expired
Pending New<A>: Order pending acceptance
Pending Cancel<6>: Cancel pending
Pending Replace<E>: Modification pending

Text Field Values (58)

Common values for the Text field in Execution Reports:

EXCHANGE_UNAVAILABLE - the gateway could not confirm whether the order was applied (exchange unreachable, request timed out, or interrupted after the order may have been accepted). Reconcile the order’s state, or retry with the same ClOrdID. Maps to OrdRejReason “Other”
INTERNAL_ERROR - a reject from a healthy exchange that could not be mapped to a specific reason. The order was not applied, so it is safe to fix and resubmit. Maps to OrdRejReason “Other”
MARKET_ALREADY_CLOSED - maps to OrdRejReason “Exchange closed”
MARKET_INACTIVE - maps to OrdRejReason “Exchange closed”
MARKET_NOT_FOUND - maps to OrdRejReason “Unknown symbol”
SELF_CROSS_ATTEMPT - maps to ExecutionType “Canceled”
SELF_CROSS_ATTEMPT_PARTIALLY_FILLED - maps to ExecutionType “Canceled”
ORDER_ALREADY_EXISTS - maps to OrdRejReason “Duplicate order”
EXCEEDED_ORDER_GROUP_RISK_LIMIT - maps to OrdRejReason “Order exceeds limit”
INSUFFICIENT_BALANCE - maps to OrdRejReason “Order exceeds limit”
EXCHANGE_PAUSED - maps to OrdRejReason “Exchange closed”
TRADING_PAUSED - maps to OrdRejReason “Exchange closed”
INVALID_ORDER - maps to OrdRejReason “Unsupported order characteristic”
ORDER_GROUP_NOT_FOUND - maps to OrdRejReason “Unsupported order characteristic”
EXCEEDED_PER_MARKET_RISK_LIMIT - maps to OrdRejReason “Order exceeds limit”
EXCEEDED_SELL_POSITION_FLOOR - maps to OrdRejReason “Order exceeds limit”
CUSTOMER_ACCOUNT_NOT_FOUND - maps to OrdRejReason “Unknown account”
PERMISSION_DENIED_FOR_CUSTOMER_ACCOUNT - maps to OrdRejReason “Unknown account”
FOK_INSUFFICIENT_VOLUME - maps to ExecutionType “Canceled”
POST_ONLY_CROSS - maps to ExecutionType “Canceled”
ORDER_GROUP_CANCEL - maps to ExecutionType “Canceled”
TAKER_CANCEL_FOR_SELF_TRADE_PREVENTION - maps to ExecutionType “Canceled”
MAKER_CANCEL_FOR_SELF_TRADE_PREVENTION - maps to ExecutionType “Canceled”
IMMEDIATE_OR_CANCELLED - maps to ExecutionType “Canceled”
EXPIRED - maps to OrdRejReason “Stale order” (RFQ quote had expired when the order arrived)

OrderCancelReject (35=9)

Exchange-side amend and cancel failures are returned as OrderCancelReject (35=9), not ExecutionReport.

Text (58)	CxlRejReason (102)
`INVALID_AMEND_QTY_FOR_ORDER`	Broker
`CANNOT_UPDATE_FILLED_ORDER`	Broker
`SELF_CROSS_ATTEMPT`	Invalid price increment

Position and Fee Information

When ExecType=Trade:

Tag	Name	Description
704	LongQty	Net Yes position after trade as a decimal quantity
705	ShortQty	Net No position after trade as a decimal quantity
136	NoMiscFees	Number of fees
137	MiscFeeAmt	Total fees in dollars
138	MiscFeeCurr	Currency (USD)
139	MiscFeeType	Exchange Fees<4>
891	MiscFeeBasis	Fee unit (always ABSOLUTE<0>)
880	TrdMatchID	Unique trade identifier
1057	AggressorIndicator	Taker/Maker flag

Collateral Changes

Tag	Name	Description
1703	NoCollateralAmountChanges	Number of collateral changes
1704	CollateralAmountChange	Delta in dollars
1705	CollateralAmountType	BALANCE or PAYOUT

Collateral Return Breakdown

When Logon tag 21027 (SplitCollateralReturn) is set to Y, Execution Reports with ExecType=Trade include:

Tag	Name	Type	Description
21030	SingleMarketCollateralReturn	Decimal	Collateral freed from reducing/closing a position in a single market. In dollars. Only present when non-zero.
21031	RangedMarketCollateralReturn	Decimal	Collateral freed from MECNET/DIRECNET netting across a market group. In dollars. Only present when non-zero.

Both values are informational subsets of the BALANCE collateral change — they describe components within the total balance delta, not additional amounts.

Party Information

Party fields from the original order request are echoed back in ExecutionReports:

Tag	Name	Description
453	NoPartyIDs	Number of parties (for sub-accounts)
448	PartyID	Sub-account identifier
452	PartyRole	Customer Account<24>
79	AllocAccount	Subaccount number (0-63)

Rejection Reasons (102)

Too late to cancel<0>: Order already filled
Unknown order<1>: Order not found
Other<99>: See Text field

Mass Cancel Request (35=q)

Cancel all orders for the trading session. Only available on KalshiNR (NewOrderMode) sessions.

Tag	Name	Description
11	ClOrdID	Unique request ID
530	MassCancelRequestType	Cancel for session<6>

Mass Cancel Report (35=r)

Response to mass cancel request.

Tag	Name	Description
11	ClOrdID	Request ID
37	OrderID	Operation ID
531	MassCancelResponse	Success<6> or Rejected<0>
532	MassCancelRejectReason	If rejected

Individual ExecutionReports will follow for each canceled order.

REST

CF Benchmarks REST

WebSockets

FIX

New Order Single (35=D)

Order Cancel/Replace Request (35=G)

Supported Modifications

Order Cancel Request (35=F)

Execution Report (35=8)

Order Status (39)

Order Rejection Reasons (103)

Execution Types (150)

Text Field Values (58)

OrderCancelReject (35=9)

Position and Fee Information

Collateral Changes

Collateral Return Breakdown

Party Information

Rejection Reasons (102)

Mass Cancel Request (35=q)

Mass Cancel Report (35=r)

​New Order Single (35=D)

​Order Cancel/Replace Request (35=G)

​Supported Modifications

​Order Cancel Request (35=F)

​Execution Report (35=8)

​Order Status (39)

​Order Rejection Reasons (103)

​Execution Types (150)

​Text Field Values (58)

​OrderCancelReject (35=9)

​Position and Fee Information

​Collateral Changes

​Collateral Return Breakdown

​Party Information

​Rejection Reasons (102)

​Mass Cancel Request (35=q)

​Mass Cancel Report (35=r)

New Order Single (35=D)

Order Cancel/Replace Request (35=G)

Supported Modifications

Order Cancel Request (35=F)

Execution Report (35=8)

Order Status (39)

Order Rejection Reasons (103)

Execution Types (150)

Text Field Values (58)

OrderCancelReject (35=9)

Position and Fee Information

Collateral Changes

Collateral Return Breakdown

Party Information

Rejection Reasons (102)

Mass Cancel Request (35=q)

Mass Cancel Report (35=r)