Fibonacci jumped into the technical mainstream late in the bull market. Futures traders had it all to themselves until real-time software ported it over to the equity markets.
I used to think only price bars could predict the future. I started as a novice, experimenting with every indicator in the book. I could never get the markets to match my mathematics, so I finally gave up and became a pattern reader. In fact, my early writings are so pattern-centric they appear intolerant of all other trading techniques.
Bollinger Bands draw their power through two important characteristics. First, they exhibit an underlying trend-range axis just like price or moving averages. Second, they constrict or expand as they move.