We scan every stock in the S&P 500 and Nasdaq-100 and surface the biggest volume-weighted daily moves and the stocks trading at a multiple of their normal volume. Real flow, not watchlist noise — free, no login.
A 5% move on $2B traded is real repricing — earnings, guidance, news. A 5% twitch on no volume is noise. The board ranks moves weighted by dollar volume, so only the real ones surface.
A stock quietly trading 3× its 20-day average volume is institutions repositioning — often before the price fully reflects it. Volume leads price. This is the footprint.
600 large caps, and nobody watches them all. The board answers one question instantly: where did something actually happen today?
Pro sends the signal to you when it fires — and unlocks the boards that find the flow early.
No. This is a data tool: it shows you what moved and where volume was unusual, with zero judgement about what you should do. No recommendations. Stocks involve real risk — always do your own research.
Yahoo Finance daily data, refreshed every 15 minutes and delayed — this is an end-of-day/near-EOD board, not a real-time feed. The universe is the S&P 500 plus the Nasdaq-100 (constituents from Wikipedia). No account or key is connected to anything.
Yes, forever — including the JSON API (/api/movers, /api/surges). Pro adds alerts, intraday scans, breakout boards and history.
Today's share volume at least 2× the stock's own trailing 20-day average. Earnings days, index rebalances and option-expiry Fridays routinely trigger it — the tag tells you that something happened, the news tells you what.
No — independent project built by a trader. Data is provided by Yahoo Finance and may be delayed or incomplete; verify before acting.