Mql4 indicator code analysis for integration into EA

Hello, I'd need a quick review on how to get rid of iCustom and integrate part of this indicator into my EA by using arrays.

I don't need to see the indicator on chart but simply use some condition to open my orders.

I don't need a fully working EA but simply three parts of the code to be added to my EA: 1)global variables 2)functions 3) load arrays + triggers