How the lists are built
Each list is arithmetic on end-of-day bars from Databento’s consolidated US equities summary, kept in our daily bar store. A gainer over three sessions is the last close against the close three sessions earlier; a new 52-week closing high is a close above every close of the 252 sessions before it; a gap is the open against the prior close; the volume list divides the session’s volume by the median of the 20 sessions before it. The figures are measurements of one session. None of them is a reason to trade, and nothing here predicts the next one.
Questions
Are these scans live?
No. They are built once per trading session from end-of-day bars, after the session is published, and every list says which session it measures. A live scanner needs real-time data we do not show publicly.
Which stocks are scanned?
The stocks our movers ingest keeps for the session: common and ordinary shares, ADRs, and trust and LP units. ETFs and funds, preferreds, warrants, units and rights are left out, because their moves are not stock moves.
Why is a stock I expected missing?
Three filters shape every list. A stock needs at least 1 million USD traded in the session (250K USD under 1 USD). The highs and lows lists need the whole lookback on file. And the bars are as traded, so a stock whose bars show a split-like overnight gap inside a list's window, without the volume a news move brings, is left out of that list rather than ranked on a move that is only a split.
The single-session board with its exclusion log: movers. Any ticker on a chart with studies and your own drawings: StockTools Charts. Educational information, not investment advice.