Volatility bands plotted two standard deviations above and below a moving average.
In depth
Bands widen during high volatility, narrow during low volatility ("squeeze" — often precedes big moves). Price tagging upper band = strength (not necessarily overbought); lower band = weakness. Mean reversion strategies sell upper, buy lower.
Frequently asked about Bollinger Bands
What is Bollinger Bands?
Volatility bands plotted two standard deviations above and below a moving average. Bands widen during high volatility, narrow during low volatility ("squeeze" — often precedes big moves). Price tagging upper band = strength (not necessarily overbought); lower band = weakness. Mean reversion strategies sell upper, buy lower.
Why does Bollinger Bands matter for investors?
In technical analysis, Bollinger Bands is one of the building blocks investors use to compare opportunities and assess risk. Understanding it helps you read research notes, earnings reports, and market commentary without getting lost in jargon.
How is Bollinger Bands used in practice?
Bands widen during high volatility, narrow during low volatility ("squeeze" — often precedes big moves). Price tagging upper band = strength (not necessarily overbought); lower band = weakness.