How to use it Cross + extreme zone is the highest-quality signal:  green crossing above   red  while down in the oversold zone (around -60) suggests a bounce; crossing below   red  up in the overbought zone (around +60) suggests a pullback. Cros…

What the signal is about It tells you two things: whether the market is overbought or oversold (the waves pushing into the upper/lower bands), and the turn in momentum (the two waves crossing each other). The blue area between the waves is just a visua…