Comparing multiple assets has value if the information that is portrayed is useful. :->)
Taking this one step further, create and plot the Comparative Relative Strength indicator by dividing the price of security A by the price of B (two stocks, a stock and a sector or index, etc.). CRS is not to be confused with Welles Wilder's RSI which is used by many.
Make sure that your data is clean (no missing data points, be they hourly, daily, whatever). This provides a comparison of how the securities are performing relative to each other. When the CRS indicator is rising, security A (the numerator) is performing better than B. When the indicator moves sideways, both securities are performing similarly. When the indicator is decreasing, B is performing better.
This indicator is useful with pairs trading where you buy the better performer and short the weaker issue, hoping to capitalize on the spread (reversion to the mean).
I have done an awful lot of correlated pairs trading and for me, the actual value of the spread difference between the price of A and B was the data that I needed and then massaged in Excel.