REST vs WebSocket for Real-Time Market Data: When to Use Each
REST or WebSocket for live market data? A plain guide to how each works, when to pull on demand versus stream, why fast polling scales badly, and how to use both together.
The SiftingIO Blog
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Engineering deep-dives, market analysis, and product updates from the SiftingIO team. How we build real-time market data infrastructure across crypto, FX, and equities.
Latest posts
Tracking institutional position changes across 13F filings
How to diff 13F-HR holdings between reporting cycles using SiftingIO, find new positions, exits, and meaningful size changes.
What are the 7 C commodities?
The 7 C commodities are coffee, corn, cotton, copper, crude oil, cocoa, and cattle. A plain guide to what the seven mean, why they are grouped, and how to track their prices.
How to get real-time forex prices from SiftingIO
A plain guide to getting live forex prices from SiftingIO: a single request for the current rate, or a live feed that updates on its own as the market moves.
Aligning economic calendar events with your backtest's bar timeline
How to pull scheduled US economic events from one endpoint and align them with OHLCV bars so a backtest knows when CPI, NFP, and FOMC actually hit.
Joining OHLCV bars and XBRL fundamentals for a US stock ticker
How to pull historical OHLCV bars and XBRL fundamentals for one stock ticker from SiftingIO, and avoid the split and fiscal-year pitfalls.
Real-time FX and crypto quotes: REST snapshots and WebSocket streams
How to fetch live bid, ask, mid, and last-trade prices for EUR/USD and BTC/USDT through SiftingIO REST snapshots and WebSocket streams.