How is percent B calculated?

Percent B equals the current price minus the lower band, divided by the upper band minus the lower band, shown as a percentage. A reading of 0% sits on the lower band and 100% sits on the upper band.

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How close is this stock trading to its upper or lower Bollinger Band right now?

Q: How close is this stock trading to its upper or lower Bollinger Band right now?

Calculates percent B, the distance to each Bollinger Band in dollars and percent, and bandwidth from your current price, upper band, lower band, and an optional middle band.

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Enter Band Levels

Pull the upper, lower, and middle band values from your charting platform, then enter them here.

Your Result

Fill in the fields on the left and click Calculate to see where price sits relative to the bands.

How this is calculated

%B measures where price sits relative to the bands: price minus the lower band, divided by the upper band minus the lower band, shown as a percentage. 0% sits on the lower band, 100% sits on the upper band, and readings can go below 0% or above 100% when price closes outside the bands.
Bandwidth, shown if you enter a middle band, equals the upper band minus the lower band, divided by the middle band. It reflects how wide the bands currently are relative to this stock's own recent range, not a fixed universal number.
This tool does not calculate the bands for you. Pull the current upper band, lower band, and middle band from your charting platform. The common default setting is a 20-period simple moving average with bands set 2 standard deviations away, though your platform may use different settings.
A %B reading describes where price is right now. It does not predict whether the stock will reverse, break out, or keep moving in the same direction.

Risk & liability disclaimer: This calculator produces a mathematical estimate based on the band values and price you enter, and it does not pull live market data. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. We do not guarantee this tool is error-free or suitable for your situation. Always verify results independently and consult a licensed professional before making any trading or financial decision. Trading involves risk of loss, and you could lose some or all of the capital you trade with.

How close is this stock trading to its upper or lower Bollinger Band right now?

Enter Band Levels

Your Result

How this is calculated

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