Bollinger Bands
Bollinger Bands combine moving averages and volatility. Learn what squeezes, expansions, and band walks actually mean.
Why Bollinger Bands matter
Bollinger Bands expand and contract with volatility. That makes them useful for judging whether price is quiet, stretched, or transitioning into a more active phase.
A move to the outer band is not automatically a reversal signal. In strong trends, price can walk the band for longer than expected.
Two common ways traders use them
- Volatility squeeze setups look for expansion after an unusually narrow range.
- Mean-reversion traders look for stretch, but only when the market is not already trending hard.
Combine Bollinger Bands with trend filters and support or resistance. The bands are most useful when they add context, not when they are used alone.
Common interpretation errors
A simple touch of the upper or lower band tells you price is extended relative to recent volatility. It does not tell you what happens next.
Put it to work in QuantRidge
Open a chart, test the setup, or ask Copilot for the next step.
Continue reading
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