new library: LibGMT.mqh | Forex Factory

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Attachments: new library: LibGMT.mqh
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new library: LibGMT.mqh

  • #1
  • First Post: Mar 6, 2010 9:09pm Mar 6, 2010 9:09pm
Here is a library to simplify time computations. Stop messing with GMT offsets and confusion. It figures out GMT time, NYC, London and Tokyo time. It uses windows calls to get local time & time zone information. It does not use the broker's server time IN ANY WAY.

It is licensed under GPL v2. Commercial users must distribute source code or contact me for a separate license.

Put LibGMT.mqh in your experts/include folder. put the test script in experts/scripts
Attached File(s)
File Type: mqh LibGMT.mqh   9 KB | 789 downloads
File Type: mq4 testLibGMT.mq4   1 KB | 660 downloads
  • #2
  • Mar 6, 2010 9:15pm Mar 6, 2010 9:15pm
Awesome effort!

What if your computer RTC drifts and windows time cannot sync ? (both are a common place scenario IMH experience)

Any fall-back mechanism ?
  • #3
  • Mar 7, 2010 11:01am Mar 7, 2010 11:01am
Quoting getdown71
Awesome effort!

What if your computer RTC drifts and windows time cannot sync ? (both are a common place scenario IMH experience)

Any fall-back mechanism ?
No. You ought to use a professionally managed VPS.
  • #4
  • Mar 7, 2010 3:49pm Mar 7, 2010 3:49pm
Thanks for these, I've always had trouble with time functions so this should save me some time!
  • #5
  • Mar 8, 2010 6:49pm Mar 8, 2010 6:49pm
Quoting mbkennel
No. You ought to use a professionally managed VPS.
I do. Not every one does though.
  • #6
  • Mar 10, 2010 7:01am Mar 10, 2010 7:01am
Thank you for this helpful lib !!

This is to confirm that it works great under Linux(Ubuntu) on my machine in Brazil (actually GMT -4) and on my Linux-VPS in timezone EST (GMT -5).
  • #7
  • May 1, 2010 4:44am May 1, 2010 4:44am
I am trying to use this library to implement 'No Trading Zones' for my EA. The problem I am having is for when times span over into a new day. For example, I want my EA to stop searching for entries after NY close at 5pm, and then restart at London 6am when I get up and start monitoring the markets. I wrote the function below. It *should* work as long as the start time is in the evening of the day before, and stop time is in the morning of the day after. This therefore precludes the other usage I intended for the function, stopping entry during periods such as NY lunchtime (11:30 - 1:30 roughly).

Any advice on how to make the function work as I envisioned would be appreciated.

Inserted Code
//--------------------------------------------------------------------------------
//Function: CheckTradingTimes
//Purpose:  Checks if current time is within a user defined no trading time zone. 
//Inputs:   None
//Returns:  true if ok to trade. 
//--------------------------------------------------------------------------------
bool CheckTradingTimes(string TZ, int StartTime, int StopTime) {
   string AlertMessage;
   int    CurrentTimeHHMM, TZTimeHHMM;
   int    CurrentDay, TZDay;
   /*
      "Local","GMT","London","NYC","Tokyo"
      extern string StartTZ   = "London";
      extern int    StartTime = "0600";
      extern string StopTZ    = "NYC";
      extern int    StopTime  = "1700";
      
      UTILITY FUNCTIONS
 
      datetime GMTseconds()       
            return the datetime (seconds since 1/1/1970) for GMT time zone.
      void MakeDayHHMM(datetime dt, int& day_of_week, int& hhmm) 
            set day_of_week and hhmm from 'dt'.
            
      USEFUL FUNCTIONS      
   
      void GetLocalDayHHMM(int& day_of_week, int& hhmm)
      void GetGMTDayHHMM(int& day_of_week, int& hhmm)
      void GetNewYorkDayHHMM(int& day_of_week, int& hhmm) 
      void GetLondonDayHHMM(int& day_of_week, int& hhmm) 
      void GetTokyoDayHHMM(int& day_of_week, int& hhmm) 
   */
   
   //- returns the values by reference
   MakeDayHHMM(TimeCurrent(),CurrentDay,CurrentTimeHHMM);
   AlertMessage = StringConcatenate("CurrentDay = ",CurrentDay," : ","CurrentTimeHHMM = ",CurrentTimeHHMM);
   //log(AlertMessage); 
   //Print(AlertMessage); 
   
   //- Get the current time in the StartTZ specified
   if(TZ=="London") {
      GetLondonDayHHMM(TZDay, TZTimeHHMM);
   }
   else {
      if(TZ=="Local") {
         GetLocalDayHHMM(TZDay, TZTimeHHMM); 
      } 
      else {
         if(TZ=="GMT") {
            GetGMTDayHHMM(TZDay, TZTimeHHMM);
         }
         else {
            if(TZ=="NYC") {
               GetNewYorkDayHHMM(TZDay, TZTimeHHMM);
            }
            else {
               if(TZ=="Tokyo") {
                  GetTokyoDayHHMM(TZDay, TZTimeHHMM);
               }  
            }   
         } 
      }  
   }
  
   AlertMessage = StringConcatenate("TZDay = ",TZDay," : ","TZTimeHHMM = ",TZTimeHHMM);
   log(AlertMessage); 
   //Print(AlertMessage); 
   log(AlertMessage); 
   //Print(AlertMessage); 
   /*if(StopTime < StartTime) {
      TZTimeHHMM = TZTimeHHMM + (TZDay)*2400;
      StopTime = StopTime + (TZDay)*2400;   
      StartTime = StopTime + (TZDay)*2400;   
      if(TZTimeHHMM > StartTime
   }*/
   
   if(TZTimeHHMM > StopTime || TZTimeHHMM < StartTime) {
      AlertMessage = StringConcatenate("Outside Trading Hours: No Entry","");
      log(AlertMessage); 
      Print(AlertMessage); 
      return(false);
   }
   else {
      AlertMessage = StringConcatenate("Within Trading Hours: OK Entry","");
      log(AlertMessage); 
      Print(AlertMessage); 
   
   }
   
   return(true);
   
}//end CheckTradingTimes()
  • #8
  • May 2, 2010 4:11pm May 2, 2010 4:11pm
Quoting mbkennel
No. You ought to use a professionally managed VPS.
BTW, re professionally managed VPS, any recommendations?
Thx much.
  • #9
  • Last Post: May 2, 2010 7:00pm May 2, 2010 7:00pm
Quoting Pdat100
BTW, re professionally managed VPS, any recommendations?
Thx much.
KickAssVPS.com is recommended Entry level system $35 PM
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