Changing from MT4 to MT5

I'm using scripts and also a template with several indicators in MT4.

If i want to use them in MT5 do they have to be re-written in MQL5?

TFZtrader:

I'm using scripts and also a template with several indicators in MT4.

If i want to use them in MT5 do they have to be re-written in MQL5?

Yes, even the most simple code will most likely need some modification.
TFZtrader:

I'm using scripts and also a template with several indicators in MT4.

If i want to use them in MT5 do they have to be re-written in MQL5?

Yes. Articles can be helpful.

https://www.mql5.com/en/articles/81