How to Read a Stock Market Heatmap
What the colours and groups on a sector heatmap mean, and how to use it to see market breadth and sector rotation in seconds.
Updated 4 Oct 2026
A heatmap shows many stocks at once as coloured tiles. Each tile is a stock, the colour shows how much it moved, and tiles are grouped - by sector, market cap or index - so you can compare groups at a glance.
Reading the colours
- Deep green: strong gain (for example above +5%).
- Light green: small gain.
- Grey: roughly unchanged.
- Light to deep red: small to large losses.
What to look for
- Breadth: is the whole map green, or are a few heavyweights carrying the index while most stocks fall?
- Sector rotation: which sectors are consistently leading or lagging over several days?
- Outliers: a single deep-red tile in a green sector often has stock-specific news worth checking.
Hindi mein saar
Heatmap mein har tile ek stock hai aur uska rang batata hai ki wo kitna chala - hara upar, laal neeche. Sectors ke hisaab se group hone se turant dikh jaata hai ki poora market chal raha hai ya kuch hi stocks, aur kaunsa sector aage hai.
For education only - not a recommendation to trade.
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