The Average True Range is a technical analysis indicator, developed by J. Welles Wilder. It is used to measure market volatility and works as an oscillator. The ATR is calculated based on the price’s true range (the high and the low prices) and represents market noise.
Developed by John Bollinger, Bollinger Bands is a technical analysis indicator used to measure market volatility. Bollinger bands are constructed based on a 20 day moving average and two outer bands based on 2 standard deviations.