the use of each trader 's bolinger band must be different from the period setting to the entry method, I will give the simplest entry method is to determine the resistance support from the ribbon over the bolinger band and the lower band from the bolinger band after that the price breaks through one of them and that's when the ribbon will be tapered, for example if the price breaks up then focus on open buy when the price is corrected in the middle band, always use period 20 as the standard of MT4, and just focus on the H4 and H1 timeframe only