> ## Documentation Index
> Fetch the complete documentation index at: https://docs.whitebit.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Collateral limit order

> Place a collateral limit order to buy or sell at a specified price via the WhiteBIT V4 API.

export const RelatedResources = ({children}) => {
  const ref = useRef(null);
  const [visible, setVisible] = useState(false);
  useEffect(() => {
    if (!ref.current) return;
    const el = ref.current;
    if (el.parentElement) {
      el.parentElement.appendChild(el);
    }
    setVisible(true);
  }, []);
  return <div ref={ref} className="related-resources" style={{
    marginTop: "2.5rem",
    paddingTop: "1.5rem",
    borderTop: "1px solid var(--border-color, #e5e7eb)",
    opacity: visible ? 1 : 0,
    transition: "opacity 0.15s ease-in"
  }}>
      <h2 style={{
    marginTop: 0
  }}>Related resources</h2>
      {children}
    </div>;
};

<RelatedResources>
  * [Collateral market order](/api-reference/collateral-trading/collateral-market-order) — Place a collateral market order
  * [Collateral stop-limit order](/api-reference/collateral-trading/collateral-stop-limit-order) — Place a collateral stop-limit order
  * [Collateral bulk limit order](/api-reference/collateral-trading/collateral-bulk-limit-order) — Place multiple limit orders in a single request
  * [Create collateral OCO order](/api-reference/collateral-trading/create-collateral-oco-order) — Create a combined limit and stop-limit order
  * [Cancel conditional order](/api-reference/collateral-trading/cancel-conditional-order) — Cancel an active conditional order
</RelatedResources>


## OpenAPI

````yaml /openapi/private/http-trade-v4.yaml POST /api/v4/order/collateral/limit
openapi: 3.0.3
info:
  title: Private HTTP API V4 - Collateral Trading
  description: |
    WhiteBIT Private HTTP API V4 for collateral/margin trading operations.

    Base URL: https://whitebit.com

    All endpoints return time in Unix-time format.
    All endpoints return either a JSON object or array.
    For receiving responses from API calls please use http method POST.

    Authentication required for all endpoints.
  version: 4.0.0
  license:
    name: WhiteBIT Terms of Service
    url: https://whitebit.com/terms
servers:
  - url: https://whitebit.com
    description: WhiteBIT Global Server
  - url: https://whitebit.eu
    description: WhiteBIT EU Server
security:
  - ApiKeyAuth: []
    PayloadAuth: []
    SignatureAuth: []
tags:
  - name: Collateral Trading
    description: Endpoints for collateral/margin trading operations
  - name: Spot Trading
    description: Endpoints for spot trading operations
  - name: Market Fee
    description: Endpoints for querying trading fees
paths:
  /api/v4/order/collateral/limit:
    post:
      tags:
        - Collateral Trading
      summary: Collateral Limit Order
      description: >
        The endpoint creates a [limit order](/glossary#limit-order) using
        [collateral balance](/glossary#balance-collateral). The order executes
        at the specified price or better. Use `buy` to open or increase a long
        position and `sell` to open or increase a short position. To close a
        position, place an opposite-side order matching the position amount.


        **Order validation rules** (per-market, from `GET
        /api/v4/public/markets`):

        - `amount` must have at most `stockPrec` decimal places

        - `price` must have at most `moneyPrec` decimal places

        - `amount` must be ≥ `minAmount`

        - `amount × price` must be ≥ `minTotal`

        - `amount × price` must be ≤ `maxTotal` (when `maxTotal` is not `"0"`)


        <Warning>

        Rate limit: 10000 requests/10 sec.

        </Warning>


        <Note>

        For open long position use **buy**, for short **sell**. To close current
        position, place opposite order with current position amount.

        </Note>


        <Note>
          - RPI orders are post-only by design and cannot be used with the IOC flag. The API returns error code `40` when both `rpi=true` and `ioc=true` are used.
        </Note>



        <Accordion title="Error Codes">
          - `30` - default validation error code. Also returned when `reduceOnly=true` is combined with `stopLoss` or `takeProfit`
          - `31` - market validation failed
          - `32` - amount validation failed
          - `33` - price validation failed
          - `36` - clientOrderId validation failed
          - `37` - `ioc=true` cannot be combined with `postOnly=true`
          - `40` - `ioc=true` cannot be combined with `rpi=true`
          - `43` - `rpi=true` is not allowed for the account
          - `10` - insufficient balance to place the order
          - `111` - resulting position would exceed the market maximum
          - `112` - pending orders value would exceed the allowed maximum
          - `113` - position side cannot be changed while open positions or orders exist
          - `114` - hedge mode position side does not match (sent `BOTH` or omitted `positionSide` in hedge mode, or sent `LONG`/`SHORT` in one-way mode)
          - `115` - order would open a position in the opposite direction (one-way mode)
          - `116` - reduce-only validation failed (no position exists or order side matches position direction)
        </Accordion>
      operationId: createCollateralLimitOrder
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - market
                - side
                - amount
                - price
                - request
                - nonce
              properties:
                market:
                  type: string
                  description: >-
                    Available margin [market](/glossary#market). Example:
                    BTC_USDT
                  example: BTC_USDT
                side:
                  type: string
                  enum:
                    - buy
                    - sell
                  description: >-
                    Order type. Variables: 'buy' / 'sell'. For open long
                    position use **buy**, for short **sell**.
                  example: buy
                amount:
                  type: string
                  description: >-
                    Amount of [stock](/glossary#stock) currency to buy or sell.
                    Minimum and step values are market-dependent — query the
                    [market info](/api-reference/market-data/market-info)
                    endpoint for constraints.
                  example: '0.01'
                price:
                  type: string
                  description: >-
                    Limit order price in [money](/glossary#money) currency.
                    Minimum price step is market-dependent — query the [market
                    info](/api-reference/market-data/market-info) endpoint for
                    constraints.
                  example: '40000'
                clientOrderId:
                  type: string
                  description: >-
                    Custom order identifier. Must be unique and contain only
                    letters, numbers, dashes, dots, or underscores.
                  example: order1987111
                stopLoss:
                  type: string
                  description: >
                    Stop loss price.


                    When provided, the system creates an
                    [OTO](/glossary#one-triggers-the-other-oto) order with a
                    stop loss condition.
                  example: '50000'
                takeProfit:
                  type: string
                  description: >
                    Take profit price.


                    When provided, the system creates an
                    [OTO](/glossary#one-triggers-the-other-oto) order with a
                    take profit condition.
                  example: '30000'
                postOnly:
                  type: boolean
                  default: false
                  description: >-
                    When `true`, guarantees the order executes as a
                    [maker](/glossary#maker) order. The system rejects the order
                    if it would immediately match as taker. Default: `false`.
                  example: false
                ioc:
                  type: boolean
                  default: false
                  description: >-
                    When `true`, the order executes all or part immediately and
                    cancels any unfilled portion. Cannot be combined with
                    `postOnly=true` or `rpi=true`.
                  example: false
                rpi:
                  type: boolean
                  default: false
                  description: >
                    Enables Retail Price Improvement (RPI) mode.


                    RPI orders are post-only by design and cannot be used with
                    `ioc=true`. The API returns error code `40` when both
                    `rpi=true` and `ioc=true` are used.
                  example: true
                positionSide:
                  type: string
                  enum:
                    - LONG
                    - SHORT
                    - BOTH
                  description: >
                    Position direction. Optional at the request layer but
                    functionally required when hedge mode is enabled. See
                    [positionSide](/glossary#position-side).


                    - **One-way mode** (default account mode): the field is
                    ignored. Orders always use `BOTH`, and the response returns
                    `positionSide: "BOTH"` whether the field is sent or omitted.

                    - **Hedge mode**: the field MUST be `LONG` or `SHORT`.
                    Sending `BOTH`, omitting the field, or sending a value that
                    does not match the account's mode causes the trade service
                    to reject the order with error code `114` (`Hedge mode
                    position side does not match`).
                  example: LONG
                reduceOnly:
                  type: boolean
                  default: false
                  description: >-
                    When `true`, the order can only reduce or close an existing
                    position — the order cannot increase the position or open a
                    new one. If the order amount exceeds the current position
                    size, the system reduces the order to match — the response
                    returns the adjusted amount. Cannot be combined with
                    `stopLoss` or `takeProfit`. The API returns error code `116`
                    if no open position exists or the order side matches the
                    position direction. See
                    [reduce-only](/glossary#reduce-only).
                  example: false
                request:
                  type: string
                  example: '{{request}}'
                nonce:
                  type: string
                  example: '{{nonce}}'
            example:
              market: BTC_USDT
              side: buy
              amount: '0.01'
              price: '40000'
              postOnly: false
              ioc: false
              clientOrderId: order1987111
              stopLoss: '50000'
              takeProfit: '30000'
              positionSide: LONG
              rpi: true
              reduceOnly: false
              request: '{{request}}'
              nonce: '{{nonce}}'
      responses:
        '200':
          description: Successful response - order created
          content:
            application/json:
              schema:
                type: object
                properties:
                  orderId:
                    type: integer
                    description: Unique order identifier
                    example: 4180284841
                  clientOrderId:
                    type: string
                    description: >-
                      Custom client order identifier. Empty string if not
                      specified
                    example: order1987111
                  market:
                    type: string
                    description: Market name
                    example: BTC_USDT
                  side:
                    type: string
                    description: Order side
                    enum:
                      - buy
                      - sell
                    example: buy
                  type:
                    type: string
                    description: Order type
                    example: limit
                  timestamp:
                    type: number
                    description: >-
                      Unix timestamp in seconds (UTC) of order creation, with
                      microsecond precision.
                    example: 1595792396.165973
                  dealMoney:
                    type: string
                    description: Amount in money currency that is finished
                    example: '0'
                  dealStock:
                    type: string
                    description: Amount in stock currency that is finished
                    example: '0'
                  amount:
                    type: string
                    description: Order amount
                    example: '0.01'
                  left:
                    type: string
                    description: Remaining amount that must be finished
                    example: '0.001'
                  dealFee:
                    type: string
                    description: Fee in money that is paid when order is finished
                    example: '0'
                  price:
                    type: string
                    description: Order price
                    example: '40000'
                  postOnly:
                    type: boolean
                    description: Post-only flag
                    example: false
                  ioc:
                    type: boolean
                    description: Immediate or cancel flag
                    example: false
                  status:
                    $ref: '#/components/schemas/ActiveOrderStatus'
                  stp:
                    type: string
                    description: Self trade prevention mode
                    example: 'no'
                  oto:
                    type: object
                    description: OTO order data when stopLoss or takeProfit is specified
                    nullable: true
                    properties:
                      otoId:
                        type: integer
                        description: OTO order identifier
                        example: 29457221
                      stopLoss:
                        type: string
                        description: Stop loss order price
                        example: '30000'
                      takeProfit:
                        type: string
                        description: Take profit order price
                        example: '50000'
                  positionSide:
                    type: string
                    description: Position side
                    enum:
                      - LONG
                      - SHORT
                      - BOTH
                    example: LONG
                  rpi:
                    type: boolean
                    description: Retail Price Improvement flag
                    example: true
                  reduceOnly:
                    type: boolean
                    description: Reduce-only flag
                    example: false
              example:
                orderId: 4180284841
                clientOrderId: order1987111
                market: BTC_USDT
                side: buy
                type: limit
                timestamp: 1595792396.165973
                dealMoney: '0'
                dealStock: '0'
                amount: '0.01'
                left: '0.001'
                dealFee: '0'
                price: '40000'
                postOnly: false
                ioc: false
                status: FILLED
                stp: 'no'
                oto:
                  otoId: 29457221
                  stopLoss: '30000'
                  takeProfit: '50000'
                positionSide: LONG
                rpi: true
                reduceOnly: false
        '422':
          description: Inner validation failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '503':
          description: Service temporarily unavailable
      security:
        - ApiKeyAuth: []
          PayloadAuth: []
          SignatureAuth: []
components:
  schemas:
    ActiveOrderStatus:
      type: string
      description: >-
        Order status. `NEW` — accepted, not yet matched. `FILLED` — fully
        executed. `PARTIALLY_FILLED` — partially executed, remainder still
        active. `CANCELLED` — canceled before full execution.
      enum:
        - NEW
        - FILLED
        - PARTIALLY_FILLED
        - CANCELLED
      example: FILLED
    ErrorResponse:
      type: object
      properties:
        code:
          type: integer
          description: Error code
          example: 30
        message:
          type: string
          description: Error message
          example: Validation failed
        errors:
          type: object
          additionalProperties:
            type: array
            items:
              type: string
          description: Detailed error information
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-TXC-APIKEY
      description: The public WhiteBIT API key.
    PayloadAuth:
      type: apiKey
      in: header
      name: X-TXC-PAYLOAD
      description: Base64-encoded JSON request body.
    SignatureAuth:
      type: apiKey
      in: header
      name: X-TXC-SIGNATURE
      description: >-
        HMAC-SHA512 signature of the payload, hex-encoded. Computed as
        hex(HMAC-SHA512(payload, api_secret)).

````