Qfex

QFEX Market Data WebSocket (MDS)

Multiplexed WebSocket gateway for all QFEX real-time market data streams: order book, trades, candles, BBO, mark price, funding rate, open interest, market stats and reference data. Documented as AsyncAPI 3.0.

Documentation GitHub

Specifications

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AsyncAPI

https://raw.githubusercontent.com/api-evangelist/qfex/refs/heads/main/asyncapi/qfex-mds-asyncapi.yml

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AsyncAPI Specification

asyncapi: 3.0.0
info:
  title: QFEX Multiplexed WebSocket API
  version: 1.0.0
  description: |-
    Single WebSocket gateway for all QFEX real‑time streams.  
    Clients publish subscription and order commands here,  
    and receive all updates over the same endpoint.
defaultContentType: application/json
servers:
  production:
    host: mds.qfex.com
    protocol: wss
    description: Production WebSocket gateway
channels:
  qfex:
    address: /
    description: Single channel for orderbook, trades, candles
    messages:
      subscribeOrderBook:
        $ref: '#/components/messages/SubscribeOrderBookCommand'
      subscribeTrades:
        $ref: '#/components/messages/SubscribeTradesCommand'
      subscribeCandles:
        $ref: '#/components/messages/SubscribeCandlesCommand'
      subscribeBbo:
        $ref: '#/components/messages/SubscribeBboCommand'
      subscribeUnderlier:
        $ref: '#/components/messages/SubscribeUnderlierCommand'
      subscribeMarkPrice:
        $ref: '#/components/messages/SubscribeMarkPriceCommand'
      subscribeFundingRate:
        $ref: '#/components/messages/SubscribeFundingRateCommand'
      subscribeOpenInterest:
        $ref: '#/components/messages/SubscribeOpenInterestCommand'
      subscribeMinmaxPrice:
        $ref: '#/components/messages/SubscribeMinmaxPriceCommand'
      subscribeMarketStats:
        $ref: '#/components/messages/SubscribeMarketStatsCommand'
      orderBookUpdate:
        $ref: '#/components/messages/OrderBookUpdate'
      tradeUpdate:
        $ref: '#/components/messages/TradeUpdate'
      candleUpdate:
        $ref: '#/components/messages/CandleUpdate'
      bboUpdate:
        $ref: '#/components/messages/BboUpdate'
      underlierUpdate:
        $ref: '#/components/messages/UnderlierUpdate'
      markPriceUpdate:
        $ref: '#/components/messages/MarkPriceUpdate'
      fundingRateUpdate:
        $ref: '#/components/messages/FundingRateUpdate'
      openInterestUpdate:
        $ref: '#/components/messages/OpenInterestUpdate'
      minmaxPriceUpdate:
        $ref: '#/components/messages/MinmaxPriceUpdate'
      marketStatsUpdate:
        $ref: '#/components/messages/MarketStatsUpdate'
operations:
  subscribeOrderBookStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeOrderBook'
  subscribeTradesStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeTrades'
  subscribeBboStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeBbo'
  subscribeUnderlierStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeUnderlier'
  subscribeMarkPriceStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeMarkPrice'
  subscribeFundingRateStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeFundingRate'
  subscribeCandlesStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeCandles'
  subscribeOpenInterestStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeOpenInterest'
  subscribeMinmaxPriceStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to a data stream
    messages:
      - $ref: '#/channels/qfex/messages/subscribeMinmaxPrice'
  subscribeMarketStatsStream:
    action: receive
    channel:
      $ref: '#/channels/qfex'
    summary: Subscribe to consolidated market statistics
    messages:
      - $ref: '#/channels/qfex/messages/subscribeMarketStats'
  receiveUpdates:
    action: send
    channel:
      $ref: '#/channels/qfex'
    summary: Receive all update messages and events
    messages:
      - $ref: '#/channels/qfex/messages/orderBookUpdate'
      - $ref: '#/channels/qfex/messages/tradeUpdate'
      - $ref: '#/channels/qfex/messages/candleUpdate'
      - $ref: '#/channels/qfex/messages/bboUpdate'
      - $ref: '#/channels/qfex/messages/underlierUpdate'
      - $ref: '#/channels/qfex/messages/markPriceUpdate'
      - $ref: '#/channels/qfex/messages/fundingRateUpdate'
      - $ref: '#/channels/qfex/messages/openInterestUpdate'
      - $ref: '#/channels/qfex/messages/minmaxPriceUpdate'
      - $ref: '#/channels/qfex/messages/marketStatsUpdate'
components:
  messageTraits:
    commonHeaders:
      headers:
        type: object
        properties:
          x-qfex-client:
            type: string
            description: Client identifier
  operationTraits:
    websocket:
      bindings:
        ws: {}
  messages:
    SubscribeOrderBookCommand:
      name: subscribe_level2
      title: level2
      summary: Subscribe to the order book
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeOrderBookCommand'
    SubscribeTradesCommand:
      name: subscribe_trades
      title: trade
      summary: Subscribe to public trades
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeTradesCommand'
    SubscribeCandlesCommand:
      name: subscribe_candles
      title: candle
      summary: Subscribe to candles
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeCandlesCommand'
    SubscribeBboCommand:
      name: subscribe_bbo
      title: bbo
      summary: Subscribe to best bid and offer
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeBboCommand'
    SubscribeUnderlierCommand:
      name: subscribe_underlier
      title: underlier
      summary: Subscribe to underlier
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeUnderlierCommand'
    SubscribeMarkPriceCommand:
      name: subscribe_mark_price
      title: mark_price
      summary: Subscribe to mark price
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeMarkPriceCommand'
    SubscribeFundingRateCommand:
      name: subscribe_funding
      title: funding
      summary: Subscribe to funding rate
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeFundingRateCommand'
    SubscribeOpenInterestCommand:
      name: subscribe_open_interest
      title: open_interest
      summary: Subscribe to open interest
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeOpenInterestCommand'
    SubscribeMinmaxPriceCommand:
      name: subscribe_minmax_price
      title: minmax_price
      summary: Subscribe to minmax price
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeMinmaxPriceCommand'
    SubscribeMarketStatsCommand:
      name: subscribe_market_stats
      title: market_stats
      summary: Subscribe to consolidated market statistics
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/SubscribeMarketStatsCommand'
    OrderBookUpdate:
      name: level2_update
      title: level2
      summary: Changes in the L2 order book
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/OrderBookUpdate'
    TradeUpdate:
      name: trade_update
      title: trades
      summary: Public trades
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/TradeUpdate'
    CandleUpdate:
      name: candle_update
      title: candle
      summary: Candle updates over various intervals
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/CandleUpdate'
    BboUpdate:
      name: bbo_update
      title: bbo
      summary: Best bid and offer updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/BboUpdate'
    UnderlierUpdate:
      name: underlier_update
      title: underlier
      summary: Underlier updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/UnderlierUpdate'
    MarkPriceUpdate:
      name: mark_price_update
      title: mark_price
      summary: Mark price updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/MarkPriceUpdate'
    FundingRateUpdate:
      name: funding_update
      title: funding
      summary: Funding rate updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/FundingRateUpdate'
    OpenInterestUpdate:
      name: open_interest_update
      title: open_interest
      summary: Open Interest updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/OpenInterestUpdate'
    MinmaxPriceUpdate:
      name: minmax_price_update
      title: minmax_price
      summary: Minmax Price updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/MinmaxPriceUpdate'
    MarketStatsUpdate:
      name: market_stats_update
      title: market_stats
      summary: Consolidated market statistics updates
      contentType: application/json
      traits:
        - $ref: '#/components/messageTraits/commonHeaders'
      payload:
        $ref: '#/components/schemas/MarketStatsUpdate'
  schemas:
    MessageEnvelope:
      type: object
      properties:
        type:
          type: string
        connection_id:
          type: string
        message_id:
          type: integer
        channel:
          type: string
        id:
          type: string
      required:
        - type
        - connection_id
        - message_id
    SubscribeOrderBookCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - level2
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD", can also use "*" for all symbols
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - level2
          symbols:
            - AAPL-USD
    SubscribeTradesCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - trade
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD", can also use "*" for all symbols
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - trade
          symbols:
            - AAPL-USD
    SubscribeCandlesCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - candle
          description: candle
        symbols:
          type: array
          items:
            type: string
          description: Symbol/Interval, e.g. "AAPL-USD/1MIN"
        intervals:
          type: array
          items:
            type: string
            enum:
              - 1MIN
              - 5MINS
              - 15MINS
              - 1HOUR
              - 4HOURS
              - 1DAY
          description: Candle intervals, e.g. "1MIN"
      required:
        - type
        - channels
        - symbols
        - intervals
      examples:
        - type: subscribe
          channels:
            - candle
          symbols:
            - AAPL-USD
          intervals:
            - 1MIN
    SubscribeBboCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - bbo
          description: bbo
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD"
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - bbo
          symbols:
            - AAPL-USD
    SubscribeUnderlierCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - underlier
          description: underlier
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD"
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - underlier
          symbols:
            - AAPL-USD
    SubscribeMarkPriceCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - mark_price
          description: mark_price
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD"
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - mark_price
          symbols:
            - AAPL-USD
    SubscribeFundingRateCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - funding
          description: funding
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD"
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - funding
          symbols:
            - AAPL-USD
    SubscribeOpenInterestCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - open_interest
          description: open_interest
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD"
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - open_interest
          symbols:
            - AAPL-USD
    SubscribeMinmaxPriceCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - minmax_price
          description: minmax_price
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD"
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - minmax_price
          symbols:
            - AAPL-USD
    SubscribeMarketStatsCommand:
      type: object
      properties:
        type:
          type: string
          enum:
            - unsubscribe
            - subscribe
        channels:
          type: array
          items:
            type: string
            enum:
              - market_stats
          description: market_stats
        symbols:
          type: array
          items:
            type: string
          description: Trading pairs, e.g. "AAPL-USD", can also use "*" for all symbols
      required:
        - type
        - channels
        - symbols
      examples:
        - type: subscribe
          channels:
            - market_stats
          symbols:
            - '*'
    OrderBookUpdate:
      examples:
        - type: level2
          symbol: AAPL-USD
          time: '2025-08-20T09:26:36.861195808Z'
          bid:
            - - '564.1'
              - '0.1'
            - - '560.3'
              - '0.001'
          ask:
            - - '566.2'
              - '2.118'
            - - '566.3'
              - '2.119'
          sig_figs: 2
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/OrderBookPayload'
    TradeUpdate:
      examples:
        - type: trade
          trade_id: ab59768f-f81e-4535-80c0-7b35f6709704
          time: '2025-08-20T09:26:36.861195808Z'
          symbol: PLTR-USD
          size: '0.100000'
          price: '157.025000'
          side: SELL
          execution_type: T
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/TradePayload'
    CandleUpdate:
      examples:
        - type: candle
          symbol: PLTR-USD
          start: '2025-08-20T09:27:00Z'
          resolution: 1MIN
          low: '155.700000'
          high: '157.225000'
          open: '156.475000'
          close: '156.900000'
          usdVolume: 16700
          trades: 16
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/CandlePayload'
    BboUpdate:
      examples:
        - type: bbo
          symbol: AAPL-USD
          time: '2025-08-20T09:26:36.861195808Z'
          bid:
            - - '564.1'
              - '2.126'
          ask:
            - - '566.2'
              - '2.118'
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/BboPayload'
    UnderlierUpdate:
      examples:
        - type: underlier
          symbol: AAPL-USD
          price: '437.45'
          time: '2025-05-08T20:52:48.000Z'
          source: external
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/UnderlierPayload'
    MarkPriceUpdate:
      examples:
        - type: mark_price
          symbol: AAPL-USD
          price: '437.45'
          time: '2025-05-08T20:52:48.000Z'
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/MarkPricePayload'
    FundingRateUpdate:
      examples:
        - type: funding
          symbol: AAPL-USD
          funding_rate: '0.21'
          time_remaining: 32 //in seconds
          time: '2025-05-08T20:52:48.000Z'
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/FundingRatePayload'
    OpenInterestUpdate:
      examples:
        - type: open_interest
          symbol: AAPL-USD
          open_interest: '1000000'
          time: '2025-05-08T20:52:48.000Z'
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/OpenInterestPayload'
    MinmaxPriceUpdate:
      examples:
        - type: minmax_price
          symbol: AAPL-USD
          min_price: '400.00'
          max_price: '450.00'
          time: '2025-05-08T20:52:48.000Z'
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/MinmaxPricePayload'
    MarketStatsUpdate:
      examples:
        - type: market_stats
          sequence: 30272540
          time: '2025-09-04T09:26:40Z'
          symbol: '*'
          bbos:
            - time: '2025-09-04T09:26:39.545268322Z'
              symbol: AAPL-USD
              bid:
                - - '10101.1'
                  - '0.4505414'
              ask:
                - - '10102.55'
                  - '0.57753524'
          mark_prices:
            - time: '2025-09-04T09:26:39.545268322Z'
              symbol: AAPL-USD
              price: '10102'
          open_interests:
            - time: '2025-09-04T09:26:39.545268322Z'
              symbol: AAPL-USD
              open_interest: '12.5'
          daily_volumes:
            - symbol: AAPL-USD
              volume: '12.5'
      allOf:
        - $ref: '#/components/schemas/MessageEnvelope'
        - type: object
          properties:
            contents:
              type: array
              items:
                $ref: '#/components/schemas/MarketStatsPayload'
    BboPayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        bid:
          type: array
          items:
            type: array
            items:
              type: string
            minItems: 2
            maxItems: 2
        ask:
          type: array
          items:
            type: array
            items:
              type: string
            minItems: 2
            maxItems: 2
    UnderlierPayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        price:
          type: string
        source:
          type: string
          enum:
            - internal
            - external
    FundingRatePayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        funding_rate:
          type: string
        time_remaining:
          type: integer
    MarkPricePayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        price:
          type: string
    OpenInterestPayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        open_interest:
          type: string
    MinmaxPricePayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        min_price:
          type: string
        max_price:
          type: string
    MarketStatsPayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
          description: Requested symbol or "*" for wildcard subscriptions
        bbos:
          type: array
          items:
            $ref: '#/components/schemas/BboPayload'
        mark_prices:
          type: array
          items:
            $ref: '#/components/schemas/MarkPricePayload'
        open_interests:
          type: array
          items:
            $ref: '#/components/schemas/OpenInterestPayload'
        daily_volumes:
          type: array
          items:
            $ref: '#/components/schemas/DailyVolumePayload'
    DailyVolumePayload:
      type: object
      properties:
        symbol:
          type: string
        volume:
          type: string
    OrderBookPayload:
      type: object
      properties:
        time:
          type: string
          format: date-time
        symbol:
          type: string
        bid:
          type: array
          items:
            type: array
            items:
              type: string
            minItems: 2
            maxItems: 2
        ask:
          type: array
          items:
            type: array
            items:
              type: string
            minItems: 2
            maxItems: 2
        sig_figs:
          type: integer
    TradePayload:
      type: object
      properties:
        trade_id:
          type: string
        time:
          type: string
          format: date-time
        symbol:
          type: string
        size:
          type: string
        price:
          type: string
        side:
          type: string
        execution_type:
          type: string
    CandlePayload:
      type: object
      properties:
        start:
          type: string
          format: date-time
        symbol:
          type: string
        resolution:
          type: string
        open:
          type: string
        high:
          type: string
        low:
          type: string
        close:
          type: string
        usdVolume:
          type: integer
        trades:
          type: integer
    BalancePayload:
      type: object
      properties:
        deposit:
          type: number
        realised_pnl:
          type: number
        unrealised_pnl:
          type: number
        order_margin:
          type: number
        position_margin:
          type: number
        available_balance:
          type: number
    PositionPayload:
      type: object
      properties:
        symbol:
          type: string
        position:
          type: number
        average_price:
          type: number
    PnlEntryPayload:
      type: object
      properties:
        user_id:
          type: string
        available_balance:
          type: number
        realised_pnl:
          type: number