Bollinger Bands were originated by John Bollinger. They are statistical calculations based on standard deviation formulas. The common setting is to construct Bollinger Bands using 2 standard deviations above and below the 20-period moving average. Using this construct, 90% of all closing prices should be contained within the Bollinger Bands. This technical indicator is essential to understanding trends, volatility, relative highs and lows, and price action. I use Bollinger Bands in multiple timeframes for various trading strategies. That's why I want you to watch these videos. They are guaranteed to help your trading decisions.