Reference to an Indicator

[Asa Sh]

Hi 

I have an indicator(A.ex5) and I want to reference it in an include file (C.mqh) or another indicator (B.ex5) But I always receive error code 4806 and 4802

As I'm new in MQL5, at first I want to know the procedure of referencing an indicator (to be sure I have done it correct) then what's the solution, as I have searched it's a kind of MQL5 bugs.

[Carl Schreiber]

1. Here is a quick introduction to MQL5: https://www.mql5.com/de/articles/496
2. To get custom indicator values in MQL5 you have to use iCustom() - there is an example in the reference (in the editor place the above iCustom and press F1!)
3. To find and correct problems use this:
   Code debugging:  https://www.metatrader5.com/en/metaeditor/help/development/debug
   Error Handling and Logging in MQL5:  https://www.mql5.com/en/articles/2041
   Tracing, Debugging and Structural Analysis of Source Code, scroll down to: "Launching and Debuggin": https://www.mql5.com/en/articles/272
   
   

[Asa Sh]

Carl Schreiber #:

1. Here is a quick introduction to MQL5: https://www.mql5.com/de/articles/496
2. To get custom indicator values in MQL5 you have to use iCustom() - there is an example in the reference (in the editor place the above iCustom and press F1!)
3. To find and correct problems use this:
   Code debugging:  https://www.metatrader5.com/en/metaeditor/help/development/debug
   Error Handling and Logging in MQL5:  https://www.mql5.com/en/articles/2041
   Tracing, Debugging and Structural Analysis of Source Code, scroll down to: "Launching and Debuggin": https://www.mql5.com/en/articles/272
   
   

thanks for your consideration,

of Corse I have read all above links, but it doesn't solve anything. it's a MQL5 bug and I need something else to achieve it.

[Paul Anscombe]

Asa Sh #:

thanks for your consideration,

of Corse I have read all above links, but it doesn't solve anything. it's a MQL5 bug and I need something else to achieve it.

It will be your code,  so if you want help you will need to post your code, along with the error description.  use the code button </>  or Alt+S to post code

[Asa Sh]

Paul Anscombe #:

It will be your code,  so if you want help you will need to post your code, along with the error description.  use the code button </>  or Alt+S to post code

My Indicator A's name is "A0_Legs_0" and it is in MQL5\Indicators and also it works fine, I reference it by bellow line in to my Include file (C.mqh)

#resource "\\Indicators\\A0_Legs_0.ex5"

the bellow function is in my Include file (C.mqh) refers to iCustom

//+------------------------------------------------------------------+
//|                                                                                 |
//+------------------------------------------------------------------+
double Legs(long A_ChID,
            string A_MySymbol,
            int t, //t:timeframe,
            int d, //d:buffers number in my indicator A (my indicator A has more than 1 buffer and I need several buffer)
            int i) //i:Candle number
{
   int Handle = iCustom(A_MySymbol, MyTimeFramesMQL4(t), "A0_Legs_0.ex5");
   int err0 = GetLastError();
   double p = 0;
   double MyLegsIndicator[];
   int copy = 0;
   copy = CopyBuffer(Handle, d, i, 1, MyLegsIndicator); //iBars(A_MySymbol, MyTimeFramesMQL4(t)) - 1
   int err = GetLastError();
   if(copy == -1)// && err == 4806)
   {
      if(err == 4806)
      {
         //--- wait till the data is uploaded
         for(int j = 0; j < 10000; ++j)
            if(BarsCalculated(Handle) > 0)
               break;
         copy = CopyBuffer(Handle, d, i, 1, MyLegsIndicator);
         err = GetLastError();
      }
   }
//--- check coying result
   if(copy == -1)
   {
      Print("Error when trying to get --A0_Legs_0-- values, last error is ", err0, "_", err, " bars ", i, " buffurs ", d, " TF ", MyTimeFrameNames[t]);
      return(0);
   }
   p = MyLegsIndicator[0];
   return(p);

then I use bellow code to get my Indicator buffers data every where else, in the include file(C.mqh) functions or in another indicator(B) that has #include <C.mqh>

Legs(A_ChID, A_MySymbol, t, 3, i)

I always receive copy = -1 then error code 4806

[Conor Mcnamara]

iCustom will nearly always fail unless you add the parameters to the call which would be the input variables in the indicator

[Paul Anscombe]

Asa Sh #:

My Indicator A's name is "A0_Legs_0" and it is in MQL5\Indicators and I reference it by bellow line in to my Include file (C.mqh)

the bellow function is in my Include file (C.mqh) refers to iCustom

then I use bellow code to get my Indicator buffers data every where else, in the include file(C.mqh) functions or in another indicator(B) that has #include <C.mqh>

As per the documentation you need to reference the resource correctly...

   int Handle = iCustom(A_MySymbol, MyTimeFramesMQL4(t), "::Indicators\\A0_Legs_0");

no idea what this is suppose to be, it is not how you access indicator data, read about copybuffer

Legs(A_ChID, A_MySymbol, t, 3, i)

https://www.mql5.com/en/docs/runtime/resources

[Asa Sh]

Paul Anscombe #:
int Handle = iCustom(A_MySymbol, MyTimeFramesMQL4(t), "::Indicators\\A0_Legs_0.ex5");

I have tried it and gets error code 4802

Paul Anscombe #:
Legs(A_ChID, A_MySymbol, t, 3, i)

this is my simple way to get data.

is there any way to you to write a simple custom indicator(A.ex5) and then call it in a simple Include file (C.mqh) and use it's data in one of the functions in C.mqh ? would you pls do it and send me the code?

[Paul Anscombe]

Asa Sh #:

I have tried it and gets error code 4802

this is my simple way to get data.

is there any way to you to write a simple custom indicator(A.ex5) and then call it in a simple Include file (C.mqh) and use it's data in one of the functions in C.mqh ? would you pls do it and send me the code?

my bad, I left the .ex5 in, you need to remove it when referencing the resource.

int Handle = iCustom(A_MySymbol, MyTimeFramesMQL4(t), "::Indicators\\A0_Legs_0");

your simple way to get data is meaningless as you have presented it. 

given that you can barely code MQL5 why are you trying to complicate it so much, you shouldn't need to use include files at your stage of knowledge.

life would be easier if you posted the whole code...

[Asa Sh]

Paul Anscombe #:
int Handle = iCustom(A_MySymbol, MyTimeFramesMQL4(t), "::Indicators\\A0_Legs_0");

It doesn't work unfortunately.

Paul Anscombe #:

your simple way to get data is meaningless as you have presented it. 

given that you can barely code MQL5 why are you trying to complicate it so much, you shouldn't need to use include files at your stage of knowledge.

life would be easier if you posted the whole code...

:), I know but, I need the data in a lots of functions so I can't write iCustom and copybuffer every time.

I have attached 3 files, 2 indicators and one C.mqh

put B.mq5 in D1 chart, it should print the data of A.mq5 in candle 10 MN (Print(Function0(ChartID(), ChartSymbol(), 7, 0, 10))) but it refers error.

[Asa Sh]

Conor Mcnamara #:
iCustom will nearly always fail unless you add the parameters to the call which would be the input variables in the indicator

put B.mq5 in the chart, it should print the data of A.mq5 in candle but it refers error.