the 10.2 bb you see are related to %B and not to price...I have put the signal lines for b% on the price chart-10.2 bb are for %b..and both upper and lower band of the 10.2 bb are above the 0.5 line of %B - so in order for first credible down to happen...lower bb 10.2 of %B needs to drop below the 0.5 line...of %B. so everytime %B touches or goes out of its lower band...while still above 0.5 line...you immediately know that price will revert back up...
You may not capture this on a normal chart where you put price and box it in a 10.2 bb......
relativity comparison...divergences..here BB is a derivative of %B and not price