Full 4:00–9:30 AM ET window
The complete pre-market session, plus regular, after-hours and full-day views.
Real-time SIP feed
100% of US trades via WebSocket — accurate RVOL, prices, gaps and VWAP.
Gainers · decliners · liquid
Sort the early movers however you trade, filter by market and security type.
Catalyst news attached
Benzinga headlines and SEC EDGAR filings explain why a stock is gapping.
Why the pre-market session matters
The hours before the 9:30 open are where the day's biggest stories first show up. Earnings, FDA decisions, guidance, analyst moves and overnight news all hit the tape in pre-market, and the stocks reacting hardest — the gappers and high relative-volume names — are often the day's best (and riskiest) opportunities. A good pre-market scanner turns that chaos into a ranked, filterable list.
What separates a real scanner from a cheap one
The feed. A scanner is only as accurate as the data it reads. TradeScaner runs on the full SIP consolidated feed — effectively 100% of US trades — so relative volume, prices and gaps reflect the entire market, not the small slice a budget IEX-only tool sees. Low-float movers that trade off-exchange simply don't get missed.
From mover to plan
Spotting a mover is step one. TradeScaner's Today's Picks goes further: it scores qualifying setups with a calibrated machine-learning win-probability model and hands you exact entry, stop and targets, sized to your budget. See how it works, or read about the win-probability model.
Pre-market scanner FAQ
What is a pre-market scanner?
A pre-market scanner watches the early trading session (4:00–9:30 AM ET in the US) and surfaces the stocks moving most before the regular open — gap-ups, gap-downs, high relative-volume names and news-driven movers — so you can build a watchlist before 9:30.
What hours does the pre-market session cover?
US pre-market runs from 4:00 AM to 9:30 AM ET. TradeScaner scans the full window and also covers regular hours, after-hours and a full-day view, so you see each session's movers separately.
What data does the scanner use?
The full SIP (Securities Information Processor) consolidated feed — effectively 100% of US trades — streamed in real time. Cheaper tools often use the partial IEX feed, which can badly understate volume and miss low-float movers.
How are movers ranked?
By absolute percentage change and relative volume (RVOL) — the strongest momentum tell — with gainers, decliners and most-liquid views. You can filter by exchange and security type, and every mover links to news and catalyst data.
Does it cost money?
The Starter plan includes the full scanner and live pre-market data; Pro adds the high-of-day momentum tapes, the Level 2 workspace and one-click broker trading. You can validate everything in paper-trading mode first. See pricing for details.
full SIP data · paper-trade first · cancel anytime