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 indicator.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.