This is the original script to my other Relative Strength indicator (link below) It provides a graphical overlay of the Relative Strength, compared to the QLD, a Nasdaq x2 ETF.
You can not use the value to compare to other stocks or securities, as it is scaled based on the price (so it can be used as an overlay).
If you want a value which you can use to compare with other stocks, please see my other Relative Strength indicator.