Most of those following this thread will, no doubt, find this reply incredible. Why, until you actually trade the method that you suggest (BB with RSI) --for as long as I have -- you will not believe that it works more than 90% of the time and will be consistently profitable. The next thing that will create disbelieve is that I can demonstrate it live with skeptics watching. If this is of any interest, feel free to contact me and requesting either a private thread or a private message. (It is impossible to write out all that one needs to know to adequately explain how to utilize this method with a concise post here.) BTW -- no charge to you so accusations of Trolling will not stand up.
Discard the 3 SD level in the BB. Learn to use the BB with just the standard 2 SD. It works just fine.
Almost every price indicator is based on rate of change ... so why not just use ROC itself. Not the ratio version but (price/price x nbr of bars ago) * 100. Above 50 bullish, below bearish. ROC on.