Any chance to implement Trailing Stop orders? Your Bolinger band strategy is the best way to do it.
The best idea, I think - to analyze the price. If bollinger band crossover event happened and the price is going over and over, the traling stop is the best choice to maximize profit.
You may to implement the price dump check. FOr example - bollinger band crossover event happened and the price is going over and over - and then the price dumping. We want to have some field in settings - the percentage of price dumping for sellling. So we take profit on the max level. That's all. I think it's a very very good and profitable idea.

Of course we need to know the entry point price for this strategy to work.