What is Bollinger Bands?
IndicatorsIntermediate
Bollinger Bands are three lines on a chart: a middle SMA with upper and lower bands at two standard deviations. When price touches the upper band, it may be overbought; the lower band, oversold. Bands squeezing together often precede a big move.
Related terms: SMA Overbought Oversold Keltner Channel Volatility