Gap Scanner

Mode

Historical mode returns every ticker's gap/RVOL/VWAP/EMA snapshot as it stood at that exact date and time (America/New_York). 1-minute resolution is only available for the last ~7 days and 5-minute resolution for ~60 days (Yahoo's own retention limits) — older dates automatically fall back to daily-bar approximation, flagged per row.

Watchlist

Comma-separated symbols. Server caps at 24 per scan (Cloudflare free-plan subrequest limit — 2 fetches/ticker + 1 batched fundamentals call must stay under 50 total).

Indicators

EMAs are computed on daily closes as a trend filter. Order in the stack check follows ascending period.

Market cap & float

Market cap and float are fetched from a separate Yahoo endpoint that's less reliable than the price data — if it fails, those columns show "—" for that scan but everything else still works. True public float (excluding insider/locked shares) isn't reliably free; when Yahoo doesn't return it, the float column falls back to total shares outstanding and is marked approx. Add Market Cap ($M) and Float (M shares, approx) as filters below like any other field.

Filters

Session windows (America/New_York)