It is an indicator that measures the volatility of the market and adapts to price changes through the narrowness of its bands, its main use stands out in the contention of price within the bands.
It is based on the calculation of the standard deviation of the price, it allows to identify when the price has gone too far from its average price range and alerts of a probable market correction.
It is recommended to use in conjunction with oscillators that measure overbought and oversold for a better interpretation.