WebSocket Real-Time Futures Data Processing in Node.js

📰 Dev.to · Propfirmkey

Learn to build a Node.js service that processes real-time futures market data using WebSockets and computes OHLCV bars in real-time

intermediate Published 11 Mar 2026
Action Steps
  1. Create a WebSocket client using the 'ws' library in Node.js to connect to a futures data feed
  2. Implement a parser to process incoming tick data from the WebSocket feed
  3. Develop an aggregator to accumulate and process the parsed data
  4. Build an OHLCV builder to compute Open, High, Low, Close, and Volume bars from the aggregated data
  5. Set up an event emitter to notify other parts of the application about updates to the OHLCV bars
Who Needs to Know This

This tutorial is beneficial for backend developers, particularly those working in the finance or trading industry, who need to handle real-time market data. It can also be useful for DevOps engineers responsible for deploying and managing such services.

Key Insight

💡 Efficient WebSocket handling is crucial for processing real-time futures market data

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🚀 Build a real-time futures data processing service in Node.js using WebSockets! 📈

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Title: WebSocket Real-Time Futures Data Processing in Node.js

URL Source: https://dev.to/propfirmkey/websocket-real-time-futures-data-processing-in-nodejs-272i

Published Time: 2026-03-11T01:00:19Z

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Posted on Mar 11

# WebSocket Real-Time Futures Data Processing in Node.js

[#node](https://dev.to/t/node)[#webdev](https://dev.to/t/webdev)[#trading](https://dev.to/t/trading)[#tutorial](https://dev.to/t/tutorial)

Processing real-time futures market data requires efficient WebSocket handling. Let's build a production-ready Node.js service that connects to a futures data feed, processes tick data, and computes OHLCV bars in real time.

## [](https://dev.to/propfirmkey/websocket-real-time-futures-data-processing-in-nodejs-272i#architecture) Architecture

```
WebSocket Feed -> Parser -> Aggregator -> OHLCV Builder -> Event Emitter
```

## [](https://dev.to/propfirmkey/websocket-real-time-futures-data-processing-in-nodejs-272i#the-websocket-client) The WebSocket Client

```
const WebSocket = require('ws');
const EventEmitter = require('events');

class FuturesDataFeed extends EventEmitter {
constructor(config) {
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