It seems like a strange question to me. First, as someone mentioned, nothing is fool-proof. with trading, so much is knowing when and when not to use something. Second, there are many ways to trade BBs, so your question is extremely ambiguous as I don't know what you mean by "false signal." Your false signal might be a positive one for me. Some tips - - Once the band height shrinks after an expansion, the move is highly likely to be over. On daily charts, you can use this to great power with the ATR (which is a measure of volatility, and as a result it tells you what kind of market you're in). - I will also use band touches with the Intraday Intensity Oscillator (similar to AD line). I don't do it very often though. Usually the more indicators you use, the worse off you are. You have to know when to use something, and when not to. - When the band height is tiny, it will expand pretty soon (not always) - On the VIX, a lower band touch (daily chart), has a high probability of a down day the next day, with a corresponding spike in the VIX - %B is generally where the trading systems find their power - I'd focus there. - BB's work best with pattern recognition. W's and M's. Though I use PnF instead - when using it. Generally I prefer Wykoff for accumulation/distribution though. Bollinger himself wrote a book on how to use them. As for a proven system, you'd have to mess around with any number of infinite permutations of the above. I haven't done that as I'm a strict discretionary trader - for better or worse. Now you have some knowledge to blow up an account, I'd suggest reading the book written by the inventor. It's been a long time since I've read it, but it's an easy read.