Help refactoring an existing MT4 HFT EA

Hello,

I need help refactoring an existing EA code and changing the Trailing system to start only when order in profit.

Review and clean the code

- remove unused variables

- rename variables and functions to be more easy to follow / relevant

- make comments so it is easy to follow and understand the EA code

Key Areas for Refactoring:

1. Variable Naming: Some variables have unclear names like Gi_180 or Gd_232 . Meaningful names will make the code easier to follow.
2. Magic Numbers: There are multiple switch cases, conditions, and calculations with constants (like 3 , 0.1 , etc.). These should be replaced with named constants or parameters.
3. Repeated Code: There is a lot of duplicated logic, especially in the start() function. Consolidating common logic into separate functions could improve readability.
4. Function Decomposition: The start() function is long and complex. Breaking it down into smaller functions with single responsibilities will improve maintainability.
5. Error Handling: The error handling is mostly repeated across multiple order operations. This could be abstracted into a function.
6. Array Management: The array manipulation in ArrayCopy() and other places can be simplified.
7. Add / repair the StopLoss to work independent for each order
   
8. Add trailing system. This should have the option to apply only when order / orders profit > predetermined value as extern input. trailing profit to be > order commision + swap
   

The EA needs to perform well also on live accounts = closed order to be in profit ( trailing profit to be > order commision + swap ) and also work with past data for backtesting!

Thank you!