Price Line overlay shows combined BCH+BTC price normalized to the price of BTC , which is the realtime combined price (BCH+BTC) averaged over the of BTC - of BCH.
This indicator is a 2-in-1 overlay + oscillator depending on which plots are enabled.
This version is the overlay script, this is why there are maths that are not used by the plot.
NEED to adjust the Persistence normalization depending on chart resolution.
Use with BCH "Domination Correlation" - the oscillator version of this script.