Bollinger Bands %B
Bollinger Band Percent (BB %B) quantifies a symbol's price relative to the upper and lower Bollinger Band. There are six basic relationship levels:
%B equals 1 when price is at the upper band
%B equals 0 when price is at the lower band
%B is above 1 when price is above the upper band
%B is below 0 when price is below the lower band
%B is above .50 when price is above the middle band (20-day SMA)
%B is below .50 when price is below the middle band (20-day SMA)