Realtime Stock Screener

Realtime Stock Screener is a free Chrome extension that provides real-time US stock quotes, live news, and price alerts. It tracks premarket movers, gainers and losers, unusual volume starting at 9:50am, after-hours activity, and a low-float stock list for stocks with relatively small float.

With filters such as Day Volume > 1k, you can build focused scans for NYSE and NASDAQ, view fundamentals and charts, and track market state via Pulse. Main screener options include Premarket (6:15am-9:30am), Gainers & Losers (9:00am-4:00pm), Unusual Volume (from 9:50am), and Afterhours (4:15pm-8:00pm). This tool supports day trading and swing trading using real-time data, news, and alerts.