Convert Tradingview's Pine script convert to MT5's MQL Language

I need to convert Pine scripts thet use real volumes in programing  language   for MT5  and if  possible to MT4 (tick volumes).

I want create a trading system for the moment manual to verify the result and after create a EA.

I attach the scripts.Attach file

Please look at the file and understand the job and let me know if you can understand what an Inventory Retracement Bar based on the material I have provided. 

Then, we are all good to go!