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Bollinger Bands, developed by John Bollinger, are a technical analysis tool for stock trading established by John Bollinger in the 1980s. The bands are usually part of a volatility indicator that calculates the relative low or high of a security’s price with respect to past trades. Volatility is quantified using standard deviation, which fluctuates when volatility rises or falls.

Don’t invest unless you’re prepared to lose all the money you invest. This is a high-risk investment and you should not expect to be protected if something goes wrong.