Calling an indicator as a function MQL5

[Renz Carillo]

I'm trying to call an indicator outside the ontick function for my user defined function but unfortunately it's producing an error, i tried calling the indicator inside the ontick function and it's working perfectly but error arises as i do the same outside the ontick function

   double emaArray[]; //Array for ema; default values would be from left to right
   ArraySetAsSeries(emaArray,true); // assign the emaarray from right to left
   double emaHandle = iMA(_Symbol,_Period,200,0,MODE_EMA,PRICE_CLOSE); // 200 ema definition
   CopyBuffer(emaHandle,0,0,11,emaArray); // assign the emaarray with ema handle

[Vladimir Karputov]

Renz Carillo:

I'm trying to call an indicator outside the ontick function for my user defined function but unfortunately it's producing an error, i tried calling the indicator inside the ontick function and it's working perfectly but error arises as i do the same outside the ontick function

Remember the main rule: in MQL5 the indicator handle needs to be received once (it is optimal to do this in the OnInit function).

[Renz Carillo]

Vladimir Karputov:
Remember the main rule: in MQL5 the indicator handle needs to be received once (it is optimal to do this in the OnInit function).

ill make sure to read it, thank you!