Non-chart timeframe data at the start of the week | Forex Factory

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Non-chart timeframe data at the start of the week

  • #1
  • First Post: Apr 23, 2012 4:12pm Apr 23, 2012 4:12pm
I've experienced a couple of times an issue with getting PERIOD_W1 data from an EA running on the D1 timeframe and it appears to occur on Mondays.

My code is simply iOpen(Symbol(), PERIOD_W1, 0) but the logic fails, as if this code is returning 0 or -1. But querying from a script it returns the correct value. (edit: I won't be able to debug this properly until next Monday!)

A bit of poking around on the internet shows that it is because MT4 does not update the PERIOD_W1 dataset automatically.

Is there a way to trigger it to be updated?


Thanks
  • #2
  • Apr 24, 2012 6:39am Apr 24, 2012 6:39am
A suggestion is to open and minimise a W1 chart. No need to have any indicators on it at all, have it "running in the background", and it should keep the W1 dataset updated.
  • #3
  • Apr 24, 2012 7:56am Apr 24, 2012 7:56am
Yes that's a good possible workaround.

Do you think I'll need to have one chart for each instrument?

I think long-term I might do a dirty fix and query the dataset until it returns a >0 value but it's a pain having to wait a week to test this theory.
  • #4
  • Apr 24, 2012 8:52am Apr 24, 2012 8:52am
Yes, a W1 chart for each instrument to be on the safe side.
  • #5
  • Edited 8:00am Apr 25, 2012 6:16am | Edited 8:00am
Quoting atr
Yes that's a good possible workaround.

Do you think I'll need to have one chart for each instrument?

I think long-term I might do a dirty fix and query the dataset until it returns a >0 value but it's a pain having to wait a week to test this theory.
hi atr,

ya query the dataset till it ready.

search for ERR_HISTORY_WILL_UPDATED on your MetaEditor Navigator, maybe you'll get some ideas.

on one of my MTF indicator i do something like this...

PHP Code
 #define ERR_HISTORY_WILL_UPDATED       4066


int start()
{
   //---if data is not ok.. do nothing   
   if ( !isDataOK() ) return(0);
   
   /*
      your stuff...
      ..............
      ..............
      ..............
   */
   
   return(0);
}


/*
this fn will force mt4 to update each timeframe on array atf[]
*/
bool isDataOK()
{
   int        itf
            , atf[] = { PERIOD_H1, PERIOD_H4, PERIOD_D1, PERIOD_W1, PERIOD_MN1 }
            ;
   datetime   times[];
   string     str;
              
   for (itf=0; itf<=ArraySize(atf); itf++)
   {
      ArrayCopySeries(times, MODE_TIME, Symbol(), atf[itf]);
      if ( GetLastError() == ERR_HISTORY_WILL_UPDATED )      
         str = StringConcatenate(str, atf[itf], " minutes data not ready\n");      
   }
   
   Comment(str);
         
   return( (StringLen(str)>0) );
}


to test it out for EURUSD W1 period , close your mt4 platform, delete your EURUSD10080.hst (of course backup it first).
then you dont need to wait till Monday
...
  • #6
  • Apr 25, 2012 9:45am Apr 25, 2012 9:45am
Thanks Bandung, that's useful information.

I'll do something like that but probably just for PERIOD_W1 as that's the only one I need cross-timeframe. I don't want to do frequent requests for something I don't need.

I'll test it tonight, thx for the tip
  • #7
  • Last Post: Apr 25, 2012 2:53pm Apr 25, 2012 2:53pm
Not coding perfection but I've tested it and it works sufficiently. Importantly I'm triggering this at a time in the market I'm not concerned about a few seconds of sleep time.

Inserted Code
      int loop = 0;

      while(iOpen(Symbol(), PERIOD_W1, 0) <= 0 && loop < 10){
         Sleep(2000);
         loop++;
      }

And your tip for deleting the HST file, it worked perfectly! (I positive and negative checked it against my old and new code).

Thanks.
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