Market Scanner Scanner versus screener
The labels overlap, but the workflow distinction is useful. A screener often answers “which securities meet these conditions now?” A real-time scanner can also answer “tell me when this event occurs.” Trade Ideas, for example, separates continuously ranked Top Lists from event-driven Alert Windows.
Choose a scanner by trading job
Day trading
Prioritize intraday refresh, event alerts, volume/price filters, and watchlist reduction.
Best day-trading scanners →AI-assisted discovery
Separate AI-generated trade candidates from natural-language screener setup or coding assistance.
Best AI stock scanners →Real-time scanning
Focus on events, alert latency, ranking, and the speed required by the strategy.
Best real-time scanners →Premarket
Build around gaps, premarket activity, liquidity, and metrics that actually calculate before the open.
Best premarket scanners →What to test before subscribing
- Can you express the exact conditions your setup requires?
- Does the tool refresh at the speed that matters for your strategy?
- Can you distinguish event alerts from ranked/filter lists?
- Can you save and reuse scans without rebuilding them each session?
- Is there a paper or backtesting path for validation?
- Does the required functionality work on your operating system and device?
Sources & verification
Product facts on this page were checked September 9, 2026. Pricing, promotions, and capabilities can change.