Currency Index Comparison on Chart

I wanted to make this script when I made XY RSI - Relative strength Index

But too many bars make the chart ugly.

Today I found a great script from melihtuna on
So I can implement this idea now.

This script is for Forex combinations of the following currencies: USD, EUR, GBP, JPY, CHF, AUD, NZD, CAD

It displayed currency index ( DXY , EXY , BXY , JXY , AXY , CXY , SXY , ZXY ) chart based on the currency pairs.

For example, USDJPY chart will automatically display green line US Dollar Index (DXY) and red line Japan Yen index (JXY).