Updates library of functions to convert mql4 code into mql5
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Migrating from MQL4 to MQL5
- www.mql5.com
This article is a quick guide to MQL4 language functions, it will help you to migrate your programs from MQL4 to MQL5. For each MQL4 function (except trading functions) the description and MQL5 implementation are presented, it allows you to reduce the conversion time significantly. For convenience, the MQL4 functions are divided into groups, similar to MQL4 Reference.
There is an include file named mt4timeseries.mqh that converts mt4 price access functions such as iHigh into mt5. I use it to convert mt4 code.
Here:
//+------------------------------------------------------------------+ //| common.mqh | //| Copyright 2009, A. Williams | //| http://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "2009, A. Williams" #property link "http://www.mql5.com" #define MODE_OPEN 0 #define MODE_LOW 1 #define MODE_HIGH 2 #define MODE_CLOSE 3 #define MODE_VOLUME 4 #define MODE_REAL_VOLUME 5 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); } } //mt4 compatible timeseries functions (it accepts timeframe as int or ENUM_TIMEFRAMES. in other words ,compatible with mt4 and mt5) double iOpen(string symbol,int tf,int index) { if(index < 0) return(-1); double Arr[]; ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(CopyOpen(symbol,timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } double iLow(string symbol,int tf,int index) { if(index < 0) return(-1); double Arr[]; ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(CopyLow(symbol,timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } double iHigh(string symbol,int tf,int index) { if(index < 0) return(-1); double Arr[]; ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(CopyHigh(symbol,timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } double iClose(string symbol,int tf,int index) { if(index < 0) return(-1); double Arr[]; ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(CopyClose(symbol,timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } datetime iTime(string symbol,int tf,int index) { if(index < 0) return(-1); ENUM_TIMEFRAMES timeframe=TFMigrate(tf); datetime Arr[]; if(CopyTime(symbol, timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } int iVolume(string symbol,int tf,int index) { if(index < 0) return(-1); long Arr[]; ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(CopyTickVolume(symbol, timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } long iVolumeReal(string symbol,int tf,int index) { if(index < 0) return(-1); long Arr[]; ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(CopyRealVolume(symbol, timeframe, index, 1, Arr)>0) return(Arr[0]); else return(-1); } int iHighest(string symbol, int tf, int type=MODE_HIGH, int count=WHOLE_ARRAY, int start=0) { if(start <0) return(-1); ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(count==0) count=Bars(symbol,timeframe); if(type==MODE_HIGH) { double Arr[]; if(CopyHigh(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMaximum(Arr)-1)+start); else return(-1); } else if(type==MODE_LOW) { double Arr[]; if(CopyLow(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMaximum(Arr)-1)+start); else return(-1); } else if(type==MODE_OPEN) { double Arr[]; if(CopyOpen(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMaximum(Arr)-1)+start); else return(-1); } else if(type==MODE_CLOSE) { double Arr[]; if(CopyClose(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMaximum(Arr)-1)+start); else return(-1); } else if(type==MODE_VOLUME) { long Arr[]; if(CopyTickVolume(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMaximum(Arr)-1)+start); else return(-1); } else if(type==MODE_REAL_VOLUME) { long Arr[]; if(CopyRealVolume(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMaximum(Arr)-1)+start); else return(-1); } else return(-1); } int iLowest(string symbol, int tf, int type=MODE_LOW, int count=WHOLE_ARRAY, int start=0) { if(start <0) return(-1); ENUM_TIMEFRAMES timeframe=TFMigrate(tf); if(count==0) count=Bars(symbol,timeframe); if(type==MODE_LOW) { double Arr[]; if(CopyLow(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMinimum(Arr)-1)+start); else return(-1); } else if(type==MODE_HIGH) { double Arr[]; if(CopyHigh(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMinimum(Arr)-1)+start); else return(-1); } if(type==MODE_OPEN) { double Arr[]; if(CopyOpen(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMinimum(Arr)-1)+start); else return(-1); } else if(type==MODE_CLOSE) { double Arr[]; if(CopyClose(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMinimum(Arr)-1)+start); else return(-1); } else if(type==MODE_VOLUME) { long Arr[]; if(CopyTickVolume(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMinimum(Arr)-1)+start); else return(-1); } else if(type==MODE_REAL_VOLUME) { long Arr[]; if(CopyRealVolume(symbol,timeframe,start,count,Arr)>0) return((count-ArrayMinimum(Arr)-1)+start); else return(-1); } else return(-1); } int iBarShift(string symbol, int tf, datetime time, bool exact=true) { if(time<0) return(-1); //sorry, exact will always =true in this code of mines. no exact=false yet. ENUM_TIMEFRAMES timeframe=TFMigrate(tf); datetime Arr[]; if(CopyTime(symbol, timeframe,iTime(symbol,timeframe,0), time, Arr)>0) return(ArraySize(Arr)-1); else return(-1); } int iBars(string symbol, int tf) { ENUM_TIMEFRAMES timeframe=TFMigrate(tf); return(Bars(symbol,timeframe)); }
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I remember seeing people offering libraries of functions to ease the transition from mql4 mql5, but i can't find the link again. I remember the library was several years old and I am not sure it is kept updated. What is the latest library that people use?
I need one for indicator, not EA nor scripts.