Subscribes/Unsubscribes to market futures Long/Short Ratios data.


Important Update: WebSocket Endpoint Migration

We are excited to announce an upgrade to our WebSocket service! To ensure that our users enjoy enhanced reliability and performance, we have migrated our WebSocket endpoint. Please update your applications to connect to the new endpoint as described here:

  • Old Endpoint: wss://
  • New Endpoint: wss://

Action Required

Users are required to update the endpoint URL in their applications. The good news is that the response JSON schemas remain unchanged, so you can expect a seamless transition with minimal adjustments needed on your end.


We understand that changes like these can raise questions. Our support team is here to assist with any issues or concerns you may have during this migration process. Please don’t hesitate to contact us for support at: [email protected].

We appreciate your prompt action to migrate to the new WebSocket endpoint.

Once you're connected to this subscription: wss://, you must provide either the instrument or exchange - one needs to be specified, both cannot be empty.


  "jsonrpc" : "2.0",
  "id"      : 1,
  "method"  : "subscribe",
  "params"  : [ "market:futures:long_short_ratios", { "instrument": "XRPUSDT", "exchange": "binance", "period": "minutely" } ]
instrumentstringThe asset instrument.
exchangestringThe exchange for which to retrieve asset instruments.


    "jsonrpc": "2.0",
    "method": "subscription",
    "params": {
        "subscription": "1a71b04a-4f9f-4638-8cb2-b0f2d9c7e51e",
        "result": {
            "exchange": "binance",
            "instrument": "BTCUSDT",
            "timestamp": 1711571100000,
            "longAccount": 0.6069,
            "ratio": 1.5439,
            "shortAccount": 0.3931,
            "period": 5
exchangestringThe exchange name.
instrumentstringThe instrument name.
timestampnumberThe time at which the long/short ratio was updated.
longAccountnumberThe proportion of accounts on the long side of the futures contract.
rationumberThe long/short ratio.
shortAccountnumberThe proportion of accounts on the short side of the futures contract.
periodnumberThe frequency of the timeInterval. When timeInterval=minutes, the period is 5, indicating 5 minutes. When timeInterval=days, the period is 1, indicating 1 day.


const WebSocket = require('ws');
const ws = new WebSocket('wss://', {headers: {x-api-key:'<api_key>'}});

ws.on('open', () => {
      jsonrpc: '2.0',
      method: 'subscribe',
      params: ['market:futures:long_short_ratios', {'instrument': 'XRPUSDT', 'exchange': 'binance', 'period': 'minutely'}],
      id: 1,

ws.on('message', data => {
  console.log(JSON.stringify(JSON.parse(data), null, 2));