What does RSI (Relative Strength Index) mean?

RSI is a momentum indicator from 0-100; readings above 70 often signal a stock is overbought, and below 30 often signal it's oversold.

RSI is a momentum oscillator from 0 to 100. Above 70 = often overbought (a pullback may be due). Below 30 = often oversold (a bounce may be due). It doesn't predict price — it measures the speed of recent moves.