Bollinger Band %b
Bollinger Bands show the volatility of a stock based on Standard Deviation around a Simple Moving Average. The related %b indicator shows the position of the Close Price relative to the bands. If the Close is at the Upper Band the %b indicator will be 100 and at the Lower Band the %b indicator will be 0. Values above 100 and below 0 are also possible.
Bollinger Bands have 3 lines. The middle line is just the Simple Moving Average.
The Upper is calculated as SMA + (Standard Deviation * Number of Deviations).
The Lower is calculated as SMA - (Standard Deviation * Number of Deviations).
%b is calculated as ((Close - Lower) / (Upper - Lower)) * 100.
The default Period for the SMA and SD is 20 and the default Number of Deviations is 2.
Bollinger Band Width %