indicator 1:1 copy , unfortunately I do not know the code. It is a paid indicator

Hello, I have a question for you. I am looking for a way to rebuild an indicator. The problem is I can not see the source code of this indicator. It is a combination of several indicators 2-3. I do not know how this indicator is programmed because I can not see the source code. Do you know a way around this ? or do you have an idea how to rebuild such an indicator yourself ?

I send you a picture, maybe you can already see something.

The guy who owns the indicator says that is a combination of ATR (Default), VWAP , RSI , Average Trend