The Basics of Bollinger Bands


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In the 1980s, John Bollinger, a long-time technician of the markets, developed the technique of using a moving average with two trading bands above and below it. 

Unlike a percentage calculation from a normal moving average, Bollinger Bands simply add and subtract a standard deviation calculation.

Standard deviation is a mathematical formula that measures volatility, showing how the stock price can vary from its true value. By measuring price volatility, Bollinger Bands adjust themselves to market conditions. 

This is what makes them so handy for traders: they can find almost all of the price data needed between the two bands. Read on to find out how this indicator works, and how you can apply it to your trading.

Read more at:
https://www.investopedia.com/articles/technical/102201.asp

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