could you place a chart...i pulled up that 240BB couldn;t see what you meant. your 200 was crystal, but this 240BB i can't see what you mean
The Bollinger bands should be one of your chart options, just apply over the 240 minute charts. there's no Magic, its just giving you a larger picture and it just shows the horizontal range in-between the outer bands. The 240mn is a 4 hour bar, so you need at least 10 days, I use at least 20 days of data.