Not sure how the statistics measure up, at the end of the day there only there to act as a tripwire if you like, to make sure your paying attention.
I think their a useful filter for abc reversals for example, not because of any guarantee it will reverse, but because using bollinger bands will give you better value for your stops if it does, by ensuring significant degrees of price divergence at reversal entries.
I think their a useful filter for abc reversals for example, not because of any guarantee it will reverse, but because using bollinger bands will give you better value for your stops if it does, by ensuring significant degrees of price divergence at reversal entries.