Simply choose what two securities (symbols) you want to compare. The study will subtract Open, High, Low, and Close of second input from the first. You may also move the plot line wherever you choose. It may be necessary to move the plot line in order for some charts to look right.
This simple indicator gives you a lot of useful information - when to enter, when to exit
and how to reduce risks by entering a trade on a double confirmed signal.
You can use in the xPrice any series: Open, High, Low, Close, HL2, HLC3, OHLC4 and ect...