the RSI is a popular indicator that tracks the price performance of a cross. this indicator takes into account the average downward variations and mean upward variations of the last n periods to generate a tracking oscillator price which ranges between 0 and 100. the most relevant are the RSI RSI to 9 days , 14 days and 15 days. It is strongly recommended to use the RSI for shorter periods because it makes this very volatile indicator and gives false signals.