Relative Strength Index (RSI)

What Is the Relative Strength Index (RSI)? The Relative Strength Index (RSI) is a technical indicator originally developed by J. Wells Wilder Jr. in his 1978 book "New Concepts of Technical Trading Systems", to measure the degree of price fluctuations and assess whether an asset is overbought or oversold. It is displayed as an oscillator (a line graph that moves between two extrema) on a scale from 0-100.

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