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INDICATORS · BAND WIDTH

Bollinger Band Width in Crypto: Why the Value Changes Before Candle Close

Band Width measures how far apart Bollinger Bands are relative to the middle line. A single big live bar can lift it out of a 'squeeze' before the close.

By ChartsPod Editorial Team · Reviewed by ChartsPod Research
Published · Updated · 5 min read

Short answer

Bollinger Band Width = (upper − lower) ÷ middle, which equals 4 × standard deviation ÷ SMA for 2-sigma bands. Because standard deviation includes the live bar, one large intrabar move can raise Band Width sharply, ending an apparent squeeze; if price returns, the reading falls back. Squeeze rules (Band Width at an N-bar low) should be evaluated on closed bars, and expansion confirmed after the close.

Which part of Bollinger Band Width uses the live bar

ComponentUses current bar?Effect intrabar
Std dev (20)YesRises with a big live move
SMA (20)YesSmall change
Band WidthYesCan leave squeeze intrabar

Standard deviation squares deviations, so one outlying live price affects it far more than one ordinary bar.

Compare Bollinger Band Width in Crypto across Binance, Bybit, OKX and Hyperliquid markets.

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How much it moves inside one bar

Bollinger Band Width during one bar (illustrative)Bollinger Band Width during one bar (illustrative): OPEN: Width 1.8% (6-month low); MID: Spike: 2.6%; LATE: Fade; CLOSE: 1.9%: still near low.OPENWidth 1.8% (6-month low)MIDSpike: 2.6%LATEFadeCLOSE1.9%: still near low
Only Bollinger Band Width's closing value is kept in history. Original ChartsPod editorial graphic.
Illustrative intrabar range of Bollinger Band Width vs its closed valueIllustrative intrabar range of Bollinger Band Width vs its closed value: Width intrabar peak (%) 3 ; Closed width (%) 2 .ILLUSTRATIVE INTRABAR RANGE OF BOLLINGER BAND WIDTH VS ITS CLOSED VALUEWidth intrabar peak (%)3Closed width (%)2
How far Bollinger Band Width travels inside a bar versus between bars. Original ChartsPod editorial graphic.

Rules

Bollinger Band Width signal hygieneBollinger Band Width signal hygiene: Signals on closed bars; Bar-close alerts; Backtest uses the same rule; Live value labelled provisional; Settings identical across chart and alerts.BOLLINGER BAND WIDTH SIGNAL HYGIENESignals on closed barsBar-close alertsBacktest uses the same ruleLive value labelled provisionalSettings identical across chart and alerts
Closed values are what history shows. Original ChartsPod editorial graphic.

Related: Bollinger Bands in Crypto: Why the Value Changes Before Candle Close.

Check Bollinger Band Width in Crypto against a live market before relying on it.

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Questions readers ask

What is Band Width?

(Upper − lower) ÷ middle.

Why does a squeeze end intrabar?

One big move inflates standard deviation.

Closed bars?

Yes, for squeeze rules.

Sources and methodology

Indicator formulas are standard definitions; live-versus-closed behaviour follows TradingView's repainting documentation. Values in examples are illustrative.

  1. TradingView Pine Script: Repainting — live vs historical calculation.
  2. ChartsPod indicator reference — indicator calculations.

This article explains research tools and workflows. It is not financial advice, does not recommend buying or selling any asset and does not predict prices. Crypto derivatives carry a risk of rapid and total loss of margin.

CHARTSPOD EDITORIAL EDITION · RESEARCH AND EDUCATION ONLY · NOT FINANCIAL ADVICE.