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INDICATORS · BOLLINGER %B

Bollinger Percent B in Crypto: Why the Value Changes Before Candle Close

%B shows where price sits relative to the Bollinger Bands: 0 at the lower band, 1 at the upper. Both numerator and denominator move intrabar.

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

Short answer

%B = (price − lower band) ÷ (upper band − lower band). On the live bar, price, both bands and the band width all change. When bands are narrow, a small price move can swing %B well beyond 0 or 1; as the bands widen during the move, %B can come back. Thresholds like %B > 1 should be judged on closed bars, and %B values compared with band width to avoid over-reading narrow-band readings.

Which part of Bollinger %B uses the live bar

ComponentUses current bar?Effect intrabar
PriceYesMoves
Lower bandYesMoves
Band width (denominator)YesSmall width amplifies

With narrow bands the denominator is small, so %B behaves like an amplified price oscillator.

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How much it moves inside one bar

Bollinger %B during one bar (illustrative)Bollinger %B during one bar (illustrative): OPEN: %B 0.62; MID: Spike: 1.24; LATE: Bands widen: 0.96; CLOSE: 0.88.OPEN%B 0.62MIDSpike: 1.24LATEBands widen: 0.96CLOSE0.88
Only Bollinger %B's closing value is kept in history. Original ChartsPod editorial graphic.
Illustrative intrabar range of Bollinger %B vs its closed valueIllustrative intrabar range of Bollinger %B vs its closed value: %B intrabar range 1 ; Typical closed change 0 .ILLUSTRATIVE INTRABAR RANGE OF BOLLINGER %B VS ITS CLOSED VALUE%B intrabar range1Typical closed change0
How far Bollinger %B travels inside a bar versus between bars. Original ChartsPod editorial graphic.

Rules

Bollinger %B signal hygieneBollinger %B 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 %B 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, Bollinger Band Width in Crypto: Why the Value Changes Before Candle Close.

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Questions readers ask

What is %B?

Price position relative to the bands.

Why does %B exceed 1 mid-bar?

Price outruns the upper band before it widens.

Closed bars?

Yes.

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.