
RSI Indicator: What It Is and How It Works
The RSI indicator (Relative Strength Index) is a momentum oscillator that measures the speed and size of recent price moves on a scale of 0 to 100, helping traders spot when an asset is overbought or oversold. Developed by J. Welles Wilder Jr. in 1978, it remains one of the most widely used tools in technical analysis, but reading it correctly takes more than memorizing "above 70, below 30."



