Gap Scanner: stocks that gapped up or down

A gap is an empty space on the chart: the stock opens above the previous day's high (a gap up) or below its low (a gap down), usually after news, earnings or a premarket move. The Gaps scanner checks every U.S. and Canadian stock after the close and lists the gaps of the last session.

A full gap means the whole day's range stayed above (or below) the previous day's range, so the gap never filled. A partial gap opened beyond the previous range but traded back into it. Full gaps show stronger buying or selling, and gaps that fill can show the move running out.

Biggest gaps up of the last session · as of November 2, 2026

Stock Gap Type Day change Close
INO Inovio Pharmaceuticals, Inc. +48.0% Full +213.7% $1.89
EVGO EVgo, Inc. +28.2% Full +46.8% $1.85
RBNE Robin Energy Ltd. +23.9% Partial +8.9% $0.151
PERI Perion Network Ltd. +22.4% Full +31.1% $11.41
NOMA NOMADAR Corp. +10.7% Partial +7.1% $1.66
PSQL Pasqal Holding SA +6.4% Partial +0.6% $5.26
NXH Bed Bath +6.1% Full +10.5% $1.69
FFM FIREFLY METALS LTD +5.6% Partial +1.5% $1.35
IDXX IDEXX Laboratories, Inc. +5.5% Full +21.8% $671.64
AUMB 1911 Gold Corporation +5.0% Partial -5.3% $0.540

End-of-day data from the last session. Sign up to see the full list, filter it and look further back.

Questions

What is a gap up?

A stock gaps up when it opens above the previous day's high. On a candlestick chart, it leaves an empty space between the two days. A gap down is the opposite: the stock opens below the previous day's low.

What is the difference between a full gap and a partial gap?

In a full gap, the stock's whole day stays beyond the previous day's range: the low stays above the previous high for a gap up. In a partial gap, it opens beyond the range but trades back into it during the day.

How is the gap size calculated?

For a gap up, it's the distance between the previous day's high and the open (or the day's low, for a full gap), as a percentage of that price.

When is the list updated?

Every trading day, overnight after the close. Stocks that gap often also show up in the Spikes and News Catalysts scanners.