> ## Documentation Index > Fetch the complete documentation index at: https://docs.kalshi.com/llms.txt > Use this file to discover all available pages before exploring further. # Order Entry > Submit, modify, and cancel margin orders through FIX messages ## New Order Single (35=D) | Tag | Name | Type | Required | Description | | ----- | ----------------------- | ------------ | -------- | ------------------------------------------------------------------------------------------------------------------------ | | 11 | ClOrderID | String | Y | Client order identifier for idempotency. UUID format is preferred. | | 18 | ExecInst | Char | N | Execution instruction flags. Supported values: `6 = Post Only` | | 38 | OrderQty | Decimal | Y | Quantity of contracts to trade. Fractional quantities are supported. | | 40 | OrdType | Char | Y | Supported values: `2 = Limit` | | 44 | Price | Decimal | Y | Price per contract in fixed-point dollars, up to 4 decimal places. | | 54 | Side | Char | Y | Supported values: `1 = Buy (bid)`, `2 = Sell (ask)` | | 55 | Symbol | String | Y | Market ticker | | 59 | TimeInForce | Char | N | Supported values: `0 = Day`, `1 = Good Till Cancel`, `3 = Immediate Or Cancel`, `4 = Fill Or Kill`, `6 = Good Till Date` | | 126 | ExpireTime | UTCTimestamp | C | Required when `TimeInForce = GTD` | | 448 | PartyID | String | N | Only applicable for FCM entities. Customer-account or subaccount identifier. | | 452 | PartyRole | Integer | N | Only applicable for FCM entities. Supported value: `24 = Customer Account` | | 453 | NoPartyIDs | Integer | N | Only applicable for FCM entities. Currently only `1` is supported. | | 79 | AllocAccount | Integer | N | Subaccount number (0-63). Alternative to NoPartyIDs. | | 526 | SecondaryClOrdID | UUID | N | [Order group](/getting_started/order_groups) identifier. | | 2964 | SelfTradePreventionType | Integer | N | Supported values: `1 = Taker At Cross`, `2 = Maker` | | 21006 | CancelOrderOnPause | Boolean | N | Cancel the order if trading pauses | ```fix Example New Margin Order theme={null} 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=10.00|40=2|54=1|55=BTC-PERP|44=19.5000| 59=1|10=123| ``` ## Order Cancel/Replace Request (35=G) Used to modify an existing order without canceling it. ### Supported Modifications * **OrderQty**: Increase or decrease the quantity. Increasing quantity forfeits queue priority. * **Price**: Change the limit price. | Tag | Name | Type | Required | Description | | --- | ------------ | ------- | -------- | --------------------------------------------- | | 11 | ClOrderID | String | Y | Unique modification request identifier | | 37 | OrderID | String | N | Kalshi exchange order identifier | | 38 | OrderQty | Decimal | Y | New total quantity for the order | | 40 | OrdType | Char | Y | Supported value: `2 = Limit` | | 41 | OrigClOrdID | String | Y | ClOrderID of the order to modify | | 44 | Price | Decimal | N | New fixed-point dollar price | | 54 | Side | Char | Y | Must match the original order side | | 55 | Symbol | String | Y | Must match the original margin market ticker | | 448 | PartyID | String | N | FCM customer-account or subaccount identifier | | 452 | PartyRole | Integer | N | FCM party role | | 453 | NoPartyIDs | Integer | N | FCM party count | | 79 | AllocAccount | Integer | N | Subaccount number | ## Order Cancel Request (35=F) Cancel all remaining quantity of an existing order. | Tag | Name | Type | Required | Description | | --- | ------------ | ------- | -------- | --------------------------------------------- | | 11 | ClOrderID | String | Y | Unique cancel request identifier | | 37 | OrderID | String | N | Kalshi exchange order identifier | | 41 | OrigClOrdID | String | Y | ClOrderID of the order to cancel | | 54 | Side | Char | Y | Must match the original order side | | 55 | Symbol | String | Y | Must match the original margin market ticker | | 448 | PartyID | String | N | FCM customer-account or subaccount identifier | | 452 | PartyRole | Integer | N | FCM party role | | 453 | NoPartyIDs | Integer | N | FCM party count | | 79 | AllocAccount | Integer | N | Subaccount number | ## Execution Report (35=8) This message is sent by the exchange to reflect changes to an order's state. | Tag | Name | Type | Required | Description | | --- | ------------ | ------------ | -------- | -------------------------------------------------------------------------------------------------------------- | | 6 | AvgPx | Decimal | Y | Average fill price in fixed-point dollars | | 11 | ClOrderID | String | Y | ClOrderID from the last change-making request | | 14 | CumQty | Decimal | Y | Total quantity filled so far | | 17 | ExecID | String | Y | Unique sequenced identifier for this report message | | 31 | LastPx | Decimal | C | Price of the last fill in fixed-point dollars | | 32 | LastQty | Decimal | C | Quantity of the last fill | | 37 | OrderID | String | Y | Exchange order identifier | | 38 | OrderQty | Decimal | Y | Order quantity. By default this is `LeavesQty + CumQty`; if `21008=Y`, it remains the original order quantity. | | 39 | OrdStatus | Char | Y | Current status of the order after this event | | 41 | OrigClOrdID | String | C | Previous ClOrderID for replaced/canceled orders | | 44 | Price | Decimal | C | Limit price in fixed-point dollars | | 54 | Side | Char | Y | Original order side | | 55 | Symbol | String | Y | Margin market ticker | | 58 | Text | String | N | Human-readable result description | | 60 | TransactTime | UTCTimestamp | Y | Timestamp for the triggering event | | 103 | OrdRejReason | Integer | C | Rejection reason when `ExecType = Rejected` | | 126 | ExpireTime | UTCTimestamp | C | Expiration timestamp | | 150 | ExecType | Char | Y | Why this execution report was sent | | 151 | LeavesQty | Decimal | Y | Remaining quantity open for execution | | 448 | PartyID | String | N | FCM customer-account or subaccount identifier | | 452 | PartyRole | Integer | N | FCM party role | | 453 | NoPartyIDs | Integer | N | FCM party count | | 79 | AllocAccount | Integer | C | Subaccount number | ### Order Status (39) * **New\<0>**: Active order, no fills * **Partially Filled\<1>**: Some quantity filled * **Filled\<2>**: Completely filled * **Canceled\<4>**: Canceled * **Replaced\<5>**: Order modified via Cancel/Replace * **Pending Cancel\<6>**: Cancel pending * **Rejected\<8>**: Order rejected * **Pending New\**: Order pending acceptance * **Expired\**: Time-in-force expired * **Pending Replace\**: Modification pending With default settings, expiry-style system cancellations are reported as `Canceled<4>`. If `21012 (UseExpiredOrdStatus)=Y`, expiry-style system cancellations emit `Expired<C>`. ### Order Rejection Reasons (103) * **Unknown symbol\<1>** * **Exchange closed\<2>** * **Order exceeds limit\<3>** * **Too late to enter\<4>** * **Stale order\<5>** * **Duplicate order\<6>** * **Unsupported order characteristic\<11>** * **Incorrect quantity\<13>** * **Unknown account\<15>** * **Other\<99>** ### Execution Types (150) * **New\<0>** * **Trade\** * **Canceled\<4>** * **Replaced\<5>** * **Rejected\<8>** * **Expired\** * **Pending New\** * **Pending Cancel\<6>** * **Pending Replace\** ### Text Field Values (58) Common values include: * `EXCHANGE_UNAVAILABLE` * `INTERNAL_ERROR` * `MARKET_ALREADY_CLOSED` * `MARKET_INACTIVE` * `MARKET_NOT_FOUND` * `SELF_CROSS_ATTEMPT` * `ORDER_ALREADY_EXISTS` * `EXCEEDED_PER_MARKET_RISK_LIMIT` * `EXCEEDED_ORDER_GROUP_RISK_LIMIT` * `ORDER_GROUP_NOT_FOUND` * `FOK_INSUFFICIENT_VOLUME` * `POST_ONLY_CROSS` * `ORDER_GROUP_CANCEL` * `TAKER_CANCEL_FOR_SELF_TRADE_PREVENTION` * `MAKER_CANCEL_FOR_SELF_TRADE_PREVENTION` * `IMMEDIATE_OR_CANCELLED` ### OrderCancelReject (35=9) Exchange-returned 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 long position after trade | | 705 | ShortQty | Net short position after trade | | 136 | NoMiscFees | Number of fees | | 137 | MiscFeeAmt | Total fees in dollars | | 138 | MiscFeeCurr | Currency (USD) | | 139 | MiscFeeType | Exchange fees | | 891 | MiscFeeBasis | Fee unit (always `ABSOLUTE<0>`) | | 880 | TrdMatchID | 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 | ### Party Information Party fields from the original request are echoed in execution reports when a sub-account is involved. ### Rejection Reasons (102) * **Too late to cancel\<0>** * **Unknown order\<1>** * **Other\<99>** ## Mass Cancel Request (35=q) Cancel all orders for the trading session. Only available on KalshiNR (NewOrderMode) sessions. | Tag | Name | Description | | --- | --------------------- | ---------------------- | | 11 | ClOrderID | Unique request ID | | 530 | MassCancelRequestType | Cancel for session\<6> | ## Mass Cancel Report (35=r) Response to mass cancel request. | Tag | Name | Description | | --- | ---------------------- | --------------------------- | | 11 | ClOrderID | Request ID | | 37 | OrderID | Operation ID | | 531 | MassCancelResponse | Success\<6> or Rejected\<0> | | 532 | MassCancelRejectReason | If rejected | Individual ExecutionReports follow for each cancelled order.