@agitins yeah u have the ryt idea. basically bolinger band strategy works like this. The centre is the 20sma. If its above the 20sma u buy, bellow the 20sma u sell.
Also when u see market contracting. In otherwards the bands getting close together... u wait. And u watch that thing like a hawk, u will see it making jumps up, jumps down... dont enter on those false signals... u wait my guy, u wait.
When u see that as clear as day that thing is going up or down. Thats when u enter. Then u just ride the mommentum.
A good clue as to where the bands will move is to use an oscillator with it so u can check for overbought or oversold areas. This usually indicates a reversal is about to occour.
In most cases the bolinger band contracts when a reversal is going to occour