Bollinger Band Width
@sminston_with · updated 2026-08-23
USD
Width as % of price
Drag to zoomLive readout
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Live BTC
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Width (live)
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Band position
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Built on yesterday's daily close (8/21/2026 · $78,359) + the live spot tacked on as today's point.
Width (last close)
23.8%
10th pct
0.1%
Median
0.2%
90th pct
0.5%
How to read it
Bollinger Band Width = (upper − lower) / middle, where the bands are ±2 standard deviations around the 20-day SMA. Values are shown as a percentage of price.
The classic "squeeze" signal: when width compresses into the 10th-percentile region, volatility is suppressed and a large directional move usually follows. When width expands into the 90th percentile, the market is in trend or flag-day mode.