Inspired by Chapter 14 "Walking The Bands" from "Bollinger on Bollinger Bands". Options to track either consecutive tags of the upper/lower bands, or crosses outside the bands.
When looking at periods when the price "walks the bands", John Bollinger recommends Intraday Intensity and/or Accumulation Distribution for confirmation of trend continuation or signs of reversal.
This indicator isn't designed for buy/sell signals alone but is quite versatile in the insights it can give when matched with other indicators.