The Relative Strength Index (RSI), developed by J. Welles Wilder, is a momentum oscillator that measures the speed and change of price movements. The RSI oscillates between zero and 100. Traditionally, the RSI is considered overbought when above 70 and oversold when below 30.

The Stochastic Oscillator, developed by George C. Lane is a two-line indicator that fluctuates between 0 and 100. The indicator shows how the current price compares to the highest and lowest price over the lookback period. When the lines are above 80, Stochastic is considered overbought. When the Stochastic lines are below 20 Stochastic is considered oversold.

Williams %R, developed by Larry Williams, is a momentum indicator that shows how the current price compares to the highest price over the lookback period. The Williams %R oscillates from 0 to -100. When the indicator produces readings from 0 to -20, this indicates overbought market conditions. When readings are -80 to -100, it indicates oversold market conditions.

Bollinger Bands, developed by John Bollinger, consist of a middle band with two outer bands. The middle band is a simple moving average. The outer bands are 2 standard deviations above and below the middle band The closer the price is above the upper band, the more overbought the market. The more the price moves below the lower band, the more oversold the market.

Keltner Channels, developed by Chester Keltner, are volatility-based bands set above and below an exponential moving average. This indicator is similar to Bollinger Bands, but instead of using standard deviation (SD), Keltner Channels use the Average True Range (ATR).