Get value from iBarShift().

[Thank-god Avwerosuoghene Odukudu]

Hello, 

How do you get a value from iBarShift() function for a timeframe other than the current at the start of the terminal (that is the first run)? It is always returning -1(or no bar) no matter what I have tried. I am creating a Multi-time Frame indicator that loops from the start date to the present, analyzing for the said pattern.

datetime startdate = D'2022.01.01';                              // Start Date
ENUM_TIMEFRAME timeframe1 = PERIOD_D1;

m_startday1 = iBarShift(_Symbol, timeframe1, startdate);         
// return -1 (when the chart is in a different TF (e.g 4H) from timeframe1(D1) at the start of the terminal)

        

if the iBarShift() is called for the current timeframe, you get a value.

int CurrentTFBar = iBarShift(_Symbol, _Period, startdate);

meaning, the user would have to change chart, or something that would re-initialize the chart for the indicator buffers to be plotted. Thanks.

Note: I wrote a test program, outputting the values of iBarShift() inside the onCalculate() function for both the current timeframe and a TF different from the current.

***

Test Code:

#property copyright ""
#property link      ""
#property version   "1.00"
#property indicator_chart_window

datetime startday = D'2022.01.04';           // current start date
ENUM_TIMEFRAMES timeframe1 = PERIOD_D1;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//--- Print the Current and Inputted TF
      Print("Filename: "__FILE__, " Function: ",__FUNCTION__);
      int CTF = iBarShift(_Symbol, _Period, startday);
      Print(__LINE__, " TimeFrame: ", EnumToString(_Period), " index: ", CTF);
      
      int tf = iBarShift(_Symbol, timeframe1, startday);
      Print(__LINE__, " TimeFrame: ", EnumToString(timeframe1)," index: ", tf);
//--- return value of prev_calculated for next call
   return(rates_total);
  }

[Vladimir Karputov]

Make the handler in Oncalculate, not in OnInit.

[Thank-god Avwerosuoghene Odukudu]

Vladimir Karputov #:
Make the handler in Oncalculate, not in OnInit.

Thanks, I have done that but it seems not to be the cause.

[Vladimir Karputov]

Thank-god Avwerosuoghene Odukudu # :

Thanks, I have done that but it seems not to be the cause.

Do as I advised you: handle all errors in OnCalculate!. And finally post the MQL5 code - otherwise my telepathic abilities are weak :)

[Thank-god Avwerosuoghene Odukudu]

Vladimir Karputov #:

Do as I advised you: handle all errors in OnCalculate!. And finally post the MQL5 code - otherwise my telepathic abilities are weak :)

I did, in the screenshot I added, thanks.

[Vladimir Karputov]

Thank-god Avwerosuoghene Odukudu # :

*** I did, in the screenshot I added, thanks.

The screenshot has been removed. Please insert the code using the button

[Vladimir Karputov]

Also check out the Documentation: Organizing Data Access

[Thank-god Avwerosuoghene Odukudu]

Vladimir Karputov #:
Also check out the Documentation: Organizing Data Access

Thanks, the file attachment I added was not deleted, I  don't know why the image attachment was.

[Vladimir Karputov]

Thank-god Avwerosuoghene Odukudu # :
Thanks, the file attachment I added was not deleted, I  don't know why the image attachment was.

Study this Documentation, after that you will know that when requesting data from someone else's timeframe, you should always check the error code (just in case: suddenly the timeseries has not been built yet).

[Thank-god Avwerosuoghene Odukudu]

Vladimir Karputov #:

Study this Documentation, after that you will know that when requesting data from someone else's timeframe, you should always check the error code (just in case: suddenly the timeseries has not been built yet).

I can check to ensure there is value, but I am wondering what would happen before I can get a value at the start. I have been reading the documentation and searching the forum. It might be something I overlooked, please, point me in that direction, thanks.

[Vladimir Karputov]

Thank-god Avwerosuoghene Odukudu # :
I can check to ensure there is value, but I am wondering what would happen before I can get a value at the start. I have been reading the documentation and searching the forum. It might be something I overlooked, please, point me in that direction, thanks.

I do not have telepathic abilities - insert your code correctly and I can help you.