Cleanup logic function inside or outside oncalculate oncalculate function

[Ismail Hassan Lemin]

In mql5 coding can a logic let's say cleanup invalid objects like IFVG be inside of oncalculate function and still work or it has to be outside with all its variables and loops then only called inside the oncalculate function to work. I have this IFVG indicator that I have been working on which doesn't  delete it's invalidated ifvg zones represented by arrows. Am thinking of introducing a new cleanup logic function outside and placing all the cleanup loops and variables then calling it once in the oncalculate function. 

[William Roeder]

To answer your two questions, either and yes.