Discussion of article "Migrating from MQL4 to MQL5" - page 12

[DrLandrov]

Note that 

#define OBJPROP_TIME1 300

#define OBJPROP_PRICE1 301

#define OBJPROP_TIME2 302

#define OBJPROP_PRICE2 303

#define OBJPROP_TIME3 304

#define OBJPROP_PRICE3 305

Are not showed in this post, you can find them by downloading the file.

[lucian mru]

Hello,

I believe there is a missing last  '}' in the SetIndexStyleMQL4 deffinition.

Thank you  for the article, really useful :)

Lucian

[Kourosh Hossein Davallou]

bool IsTesting()

bool MQLInfoInteger(MQL_TESTER)

bool IsTradeAllowed()

bool MQLInfoInteger(MQL_TRADE_ALLOWED)

bool IsVisualMode()

bool MQLInfoInteger(MQL_VISUAL_MODE)

[Kourosh Hossein Davallou]

ENUM_TIMEFRAMES TFMigrate(int tf)
  {
   switch(tf)
     {
      case 0: return(PERIOD_CURRENT);
      case 1: return(PERIOD_M1);
      case 5: return(PERIOD_M5);
      case 15: return(PERIOD_M15);
      case 30: return(PERIOD_M30);
      case 60: return(PERIOD_H1);
      case 240: return(PERIOD_H4);
      case 1440: return(PERIOD_D1);
      case 10080: return(PERIOD_W1);
      case 43200: return(PERIOD_MN1);
      
      case 2: return(PERIOD_M2);
      case 3: return(PERIOD_M3);
      case 4: return(PERIOD_M4);      
      case 6: return(PERIOD_M6);
      case 10: return(PERIOD_M10);
      case 12: return(PERIOD_M12);
 //    case 16385: return(PERIOD_H1);
       case 16386: return(PERIOD_H2);
      case 16387: return(PERIOD_H3);
      case 16388: return(PERIOD_H4);
      case 16390: return(PERIOD_H6);
      case 16392: return(PERIOD_H8);
      case 16396: return(PERIOD_H12);
      case 16408: return(PERIOD_D1);
      case 32769: return(PERIOD_W1);
      case 49153: return(PERIOD_MN1);      
      default: return(PERIOD_CURRENT);
     }
  }

[Nikolai Karetnikov]

minefield

[Maxime Francois Patrice Ritter]

Hello,

This old article (may 2010, more than 11 years ago !) was one of the first trying to simplify the process of migrating a script/EA from MQL4 to MQL5. Meantime, the popular mql4compat.mqh has been created, and I just published a maintained version of mql4compat on github for people interested : https://github.com/eromawyn/mql4compat

[Samson Mthande Mashabane]

Hi I am struggling with these functions (please see below) I keep on getting these errors. Please help resolve it.

[Vladimir Karputov]

Samson Mthande Mashabane # :
Hi I am struggling with these functions (please see below) I keep on getting these errors. Please help resolve it.

A picture is good, but you need an MQL5 code. You need to insert the code using the button

[Andrey Kaunov]

There is incorrect information in section 19. The function

void HideTestIndicators(bool hide)

has an analogue in MQL5

void TesterHideIndicators(bool hide)

[Aldo Marco Ronchese]

Hi Guys , thanks a stack for the great work.

I was having an issue getting fractals to work when converting from MT4 .. this helps by returning 0 instead of EMPTY_VALUE  .. hope this is the right place to post thanks

double iFractals4(string symbol,
                     int tf,
                     int mode,
                     int shift)
  {
   ENUM_TIMEFRAMES timeframe=TFMigrate(tf);
   int handle=iFractals(symbol,timeframe);
   if(handle<0)
     {
      Print("The iFractals object is not created: Error",GetLastError());
      return(-1);
     }
   else
   {
   double buffer=CopyBufferMQL4(handle,mode-1,shift);
      if (buffer!=EMPTY_VALUE) return(CopyBufferMQL4(handle,mode-1,shift));
      else return(0);
      }
  }