The Double Bollinger Band consists of an average and two Bollingers and two backgrounds, each of which has separate settings and can be approved more strongly for trades. Moves and vice versa. With the price chart coming out of the second band, the price is much more likely to move in the same direction. To use this feature, we had to use two Bollinger indicators with different settings at the same time, but we no longer need to do this with the Double Bollinger . Its main use is crypto, but it can be used in all markets