Modify Ultimate RSI Indicator to Add Regular Divergence and Source Line Options

I want to modify the existing free TradingView indicator called "Ultimate RSI." The goal is to add regular divergence functionality without altering its current logic or functionality. Additionally, I want to modify it slightly to allow viewing different source lines, such as open, close, high, etc... (Budget: $25 - $50 USD, Jobs: C Programming, C# Programming, C++ Programming, Metatrader, Software Architecture)