Why it does not work in Inite and how do I make it work? - MQL4 and MetaTrader 4

Artyom Trishkin 2021.07.04 22:11 #15281

Alexey Viktorov:

Yeah and I looked it up to answer you too.

I couldn't - I was writing from my phone and it's quicker just to write the question :)

Andrei Sokolov 2021.07.05 13:40 #15282

Alexey Viktorov:

It's not imposed by the developers, but by one moderator. As for the BB values, so Artem told you that it's easier to get everything directly... the sequence is like this...

Declared Handle variables and arrays to get indicator values. If necessary, 3 at most. If we don't need an average, two arrays will be enough.
In OnInit() we received the indicator handle...
In OnTick() or in some other function CopyBuffer() for each line separately, as many as necessary.
From these arrays you get the values of indicator lines on those bars which are interesting...

THAT'S IT. Why bother with OOP¿¿¿¿¿? Unfortunately, I can't answer your question directly, because I'm not using it. It's easier for me as I described. There are only 4 actions.

Please tell me why it does not work in Inite? And how do I make it work?

#property strict

//--- индикаторные буферы
double         UpperBuffer[];
double         LowerBuffer[];
double         MiddleBuffer[];
//--- переменная для хранения хэндла индикатора iBands
int    bb_handle;

int OnInit(){//////////////***OnInit()****///*************OnInit()*******/////////***/////////////////////////OnInit()

bb_handle=iBands(NULL, 0, 20, 0, 2.0, PRICE_CLOSE);

Print("bb_handle ", bb_handle);

Print("OnInit()  ", BB_up(0), "  ", BB_mi(0), "  ", BB_lo(0));

return(INIT_SUCCEEDED);
}
void OnTick(){




Print("OnTick()  ", BB_up(0), "  ", BB_mi(0), "  ", BB_lo(0));

}
//-------------------------------------------------------1
double BB_up(int in_shift){
   CopyBuffer(bb_handle, 1, in_shift, 1, UpperBuffer);
   return UpperBuffer[0];
}
double BB_mi(int in_shift){
   CopyBuffer(bb_handle, 0, in_shift, 1, MiddleBuffer);
   return MiddleBuffer[0];
}
double BB_lo(int in_shift){
   CopyBuffer(bb_handle, 2, in_shift, 1, LowerBuffer);
   return LowerBuffer[0];
}