Relative Strength Index (RSI)

The Relative Strength Index (RSI) is a metric between 0 and 100 that is used to define momentum in a certain security’s price movement. RSI above 70 can be viewed as overbought conditions for a security, and RSI below 30 can be viewed as oversold conditions.

RSI = 100 – [100 / (1 + RS)]

RS = average gain during up periods / average loss during down periods