The relative strength index (RSI) is a momentum indicator used in technical analysis. RSI measures the speed and magnitude of a security's recent price changes to detect overbought or oversold conditions in the price of that security. The RSI is displayed as an oscillator (a line graph) on a scale of zero to 100.
The best RSI settings are typically a 14-period timeframe with 70 as the overbought level and 30 as the oversold level. These settings can be adjusted based on specific trading strategies.