Premarket Movers - Top Stock Gainers & Losers
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from $1.00 / 1,000 results
Today's top premarket movers: biggest US stock gainers and losers before the open, plus regular and after-hours movers. Each row has ticker, session % change, price, volume, gap, market cap, sector, float. Clean JSON for AI trading agents and LLM pipelines.
Which trading session to scan. Premarket data is available from ~4:00 AM ET on trading days; after-hours data from ~4:00 PM ET until the next premarket. Asking for a session that hasn't populated yet returns a free no_data row explaining the timing.
Gainers, losers, or both. With 'both', the dataset contains up to limit gainers followed by up to limit losers; each row carries a direction field.
How many top movers to return per direction, ranked by session % change. 25 gainers + 25 losers is a readable morning briefing that fits comfortably in an LLM context window.
Minimum stock price in whole dollars, applied to the reference close (previous close during premarket, latest price intraday). A stock that CRASHES below this in the session still appears - the filter screens out stocks that were already sub-dollar. Set 0 to see everything.
Minimum shares traded IN THE SELECTED SESSION (premarket volume for premarket, etc.). Separates real moves from thin 200-share prints. Set 0 to disable.
Minimum market capitalization in USD. Set 1000000000 (1B) to only see large/mid caps moving, 0 (default) for no cap filter.
Include ETFs and other funds. Off by default because leveraged ETFs (2x/3x products) otherwise dominate every movers list without carrying any single-stock signal.
