Hi,

As we know the formula for computing Relative Strength Index (RSI) = 100 - (100/(1+RS)) where RS is the relative strength (ratio of average gain and average loss). In general, the look-back period is 14 days. I want to know how to calculate RSI for intra-day. Is there a lookback period of 14 minutes for intra-day? If it is 14 minutes, then how to compute the RSI for the first 13 minutes?