Where should i place the Ontester function?

[kc8yty559]

Trying implement  the On tester function.  Where does it go?  

[Anthony Garot]

kc8yty559:
Trying implement  the On tester function.  Where does it go?  

The documentation gives a code example of how this works:

https://www.mql5.com/en/docs/event_handlers/ontester