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Download history in MQL4 EA - page 6

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William Roeder #:

  1. Why are you using current? That will always be correct. It's purpose is to get other symbols/TFs.

  2. Correct.

  3. Had to go to my sources. Originally had HR2400 86400. Changed it sometime to the above which broke it. Equal precedence, left to right: dt % PERIOD_D1 * 60 not equal to dt % (PERIOD_D1 * 60).

  4. Wouldn't have been a problem if you had used the corrected version which doesn't use TimeOfDay(). Try this:

I still don't get it. Please advice. Lets say I just want to plot a vertical line at 12:00 on a current chart for current timeframe using indicator.

ObjectCreate(0,"VLine",OBJ_VLINE,0,iTime(NULL,0,0)-iTime(NULL,0,0)%HR2400+12*HR0100,0);

I need to download chart history first for the current period to be sure the vertical line will be plotted at 12:00, when I e.g. is manually changing chart symbol. Where should I put this ObjectCreate function? Any code changes should be done?

William Roeder #:

That will always be correct.

That's right. In case of PERIOD_CURRENT this method always returns true, even if chart did download some history. How to determine the finish of history downloading on PERIOD_CURRENT?

Has anyone noticed any changes in the MT4 automatic validation process for Expert Advisors?

I’m experiencing an issue where using basic conditions like iHigh , Bars , or iBars results in a "no trading operations" error during validation. However, if I introduce a time-based condition (e.g., buying/selling in the first minute of each hour), the validation passes.

  • All OrderChecks functions are properly implemented.
  • Risk and Order Management logic is the same for booth.
  • The same EA passes MT5 validation without any issues.

Could this be related to how historical data is handled during the MT4 validation process? Has anyone else encountered this?

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