Compares the z-score of two assets, the onscreen one and the reference one configured. If you're familiar, you can think of it as Bollinger Band Percent of Onscreen Asset minus the Bollinger Band Percent of Reference Asset.
It's compared off a simple moving average, due to how standard deviation is calculated.
I view this a more literal meaning of relative strength. Has the ability to offset or delay in time one to another.
TODO: add MAD and MAD/STD.DEV views Not my greatest work, but it's functional.