BOLLINGER BAND Indicator of Volatility

A Bollinger Band is an Indicator of Volatility, and the technical analysis tool is defined by a set of lines plotted by standard deviations, one positively and other negatively, and away from a simple moving average (SMA) of the security's price.
When the markets become more volatile the bands widen.
When the markets become less volatile the bands contract.
Technical IndicatorsVolatility

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