Steve Hopwood's programming room... Share your hints and tips here

Quoting awk

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Do my hints have any value to you Steve? I am constantly trying to improve in terms of comprehensibility and clarity.

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bool double2bool(double in) {
    if (in>0) return true;
    return false;
}

double bool2double(bool in) {
    if (in) return 1.0;
    return -1.0
}

Quoting awk

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In mql4 there are no compound types (structs) so a function can really just return single value, or an array of the same types.

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Quoting awk

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We are definitely not done. I don't know about indicators that much, this thread was started to explain, how to apply general software engineering knowledge to EA programming. But maybe someone else may answer?

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Quoting 7bit

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Did you find a way to declare an mql4 function that will return an array? I couldn't find any documentation on this and also didn't find an undocumented way so i am still forced to use by reference.

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Quoting awk

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it seems we have to use only passing arguments by reference.

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Quoting sogt725

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http://www.molanis.com/products

I know that the above has probably <10% the diminutive power of manually coded EAs.

But what do u think holds in store for these GUI cut-copy-paste icons meant for non-programmers?

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Quoting Big E!

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So please, no one waste any time on this.

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Quoting jidonk

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Hi,

Hope someone can help me...

How can I use FFcal indicator to trigger order x minutes after the news with different SL / TP value for different impact news? Something like: for High impact news set SL/TP 50/50, Medium impact new set SL/TP 30/30, etc..

Thanks

Regards,
Jidonk

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 bool NewsFilterCheck()
{
   // Checks for impending news events.
   // Deletes pending trades where necessary.
   // Closes open trades in profit or at be if required.
   // Returns true if news is inside the user parameters, else false

   
   if(!IsTesting())
   {      
      int  minutesUntilNextEvent = iCustom(NULL, 0, "FFCal", true, true, false, true, true, 1, 1);
      datetime dTime = minutesUntilNextEvent * 60;
      string sTime = TimeToStr(dTime, TIME_MINUTES);
      string sText;
      
      if (minutesUntilNextEvent>MinsUntilNews)//No news within the chosen timescale
      {
         sText = StringConcatenate("No News within the next ", sTime);
         bool TradeAllowed = true;
      }//if (minutesUntilNextEvent>MinsUntilNews)
      else
      {
         //News event within the chosen timescale
         int impactOfNextEvent = iCustom(NULL, 0, "FFCal", true, true, false, true, true, 2, 1);
         string sImpact = Num2Impact(impactOfNextEvent);
         if(StringLen(sImpact)>0) sImpact = "[" + sImpact + "] ";
         //sText = sImpact + "News in " + minutesUntilNextEvent + " mins.";
         sText = sImpact + "News in " + sTime;
         ScreenMessage = StringConcatenate(ScreenMessage, Gap, sText, NL);
         //Should the robot suspend trading?
         if (impactOfNextEvent >= NewsImpact)
         {
            TradeAllowed = false;//Suspend trading            
         }//if (impact >= NewsImpact)
         
      }//else
      ScreenMessage = StringConcatenate(ScreenMessage, Gap, sText, NL);
      return(TradeAllowed);
   }//if(!IsTesting())


}// End bool NewsFilterCheck()

string Num2Impact(int impact)
{
 if (impact == 3) return ("HIGH IMPACT");
 if (impact == 2) return ("MED IMPACT");
 if (impact == 1) return ("LOW IMPACT");
 else return ("");
}//End string Num2Impact(int impact)

int  minutesSincePreviousEvent = iCustom(NULL, 0, "FFCal", true, true, false, true, true, 1, 0);
int impactOfPreviousEvent = iCustom(NULL, 0, "FFCal", true, true, false, true, true, 2, 0);

         if (impactOfNextEvent >= NewsImpact)
         {
            TradeAllowed = false;//Suspend trading            
         }//if (impact >= NewsImpact)

Quoting shahab8b

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Hi Steve,
I wonder if you could help me in an EA based on this indicator:
the indicator is created by bruce, I wrote him to see if there is any EA based on that but I didnt get any reply.
also I have a Hedging algorithm based on this indicator, I traded in paper and live (limited times) that but it needs to be automated (particularly for hedging).
I appreciate your help in advance

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