How I Use the RSI Indicator The RSI (Relative Strength Indicator) is a is a momentum oscillator that measures the speed and change of price movements. The RSI moves in a bounded range between zero and 100. I use the RSI on the (14) setting on the daily chart. The RSI is generally overbought when its reading is above 70 and oversold when it reads below 30. Signals can also be generated by looking..