Period Converter Optimized Indicator For MT4

Period Converter Optimized Indicator For MT4

The Period Converter Optimized Indicator For MT4 is a customized version of the MT4 default period converter. It supports real time refreshing, and puts lesser strain on the CPU.

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Installing the Period Converter Optimized Indicator For MT4

After you downloaded the indicator via the form above you need to unzip the zip-file. Then you need to copy the file Period_Converter_Opt.mq4 into the folder MQL4\Indicators of your MT4 installation. After that please restart MT4 and then you will be able to see the indicator in the list of indicators.

Parameters of the Period Converter Optimized Indicator For MT4

The Period Converter Optimized Indicator For MT4 has 7 parameters to configure.

extern double  Version = 1.4;             // code version
extern string  BuildInfo = "2005.12.24 by This email address is being protected from spambots. You need JavaScript enabled to view it.";
extern int     PeriodMultiplier = 2;      // new period multiplier factor
extern int     OutputCSVFile = 0;         // also output CSV file?
extern int     UpdateInterval = 0;        // update interval in milliseconds, zero means update real-time.
extern bool    Enabled = true;
extern bool    Debug = false;

Buffers of the Period Converter Optimized Indicator For MT4

The Period Converter Optimized Indicator For MT4 provides 0 buffers.

Main Parts Of The Code

so you have to apply every converter script again after restarting, quite
annoying.

This one fixed all above problems:
1. Real-time updating or custom interval millisecond level updating.
2. Low CPU cost, average 5%-10% or less.
3. Works as an indicator, so can be saved and reloaded during restart. 
4. There is no one converter per chart limitation as it is not script
   any more, you can only use one window as source to generate as many
   new timeframe chart as possible.
5. Auto updating if there is new history block loaded.

II. How to use:
Copy the mq4 file to your MT4 indicators folder (expertsindicators)
to install it as an indicator, NOT script. then in the custom indicator 
list, attach period_converter_opt to the chart you want.
It support 4 parameters:
PeriodMultiplier:    new period multiplier factor, default is 2
UpdateInterval:      update interval in milliseconds, 
                     zero means update real-time. default is zero.
Enabled:             You can disable it without remove it with this option.

Other parameters are comments or for debugging, it is safe to ignore them.

Also Make sure you have Allow Dll imports option checked in common tab or
it won t work

After that, File- gt Open Offline to open the generated offline data. then
the offline data will be updated automatically.

As long as you keep the source chart open and the converter indicator 
running, the generated chart including indicators inside will always 
be updated. also you can close the generated chart and open again 
later from File- gt Open Offline without problem.

If you want to quit MT4, you can leave those offline chart as other
normal online charts. when you start MT4 next time, those charts will
also be loaded and updated.


III. Notes:
1. Do NOT uncheck the "offline chart" option in offline chart common properties.
   or after MT4 restart, it will treat that chart as online chart and request
   the data from server, resulting empty chart window.
2. You can attach more than one converter to same window with different 
   PeriodMultiplier, e.g: you can attach 3 converter with 
   PeriodMultiplier = 2, 4, 10 to M1 to generate M2, M4, M10 at the same time.
   It is even ok to use the M1 chart to generate Hourly chart like H2, which
   only cost a few more CPU resource during initial conversion. but usually 
   most server don t have much data for those short period. resulting the 
   generated data isn t long enough for long period. so it is suggested 
   to use Hourly/Daily charts as source when needed.
3. The real-time updating mode updates quotes as fast as possible, but as
   this is done via script, and MT will skip calling start() function when
   your PC is busy and lots of quotes income. anyway, this seldom happen,
   and you can at least get 10 updates each seconds which is much more
   than enough.
4. The offline chart don t have a bid line showing in chart, but all data
   in the chart including the indicators is still being updated, 
   so don t worry. you can show the bid line by unclick the "offline chart" 
   option in chart properties. but which don t helps much and if you forget
   to check "offline chart" option before exit. it will cause errors and
   become empty on next startup. you have to close the window and open
   again from File- gt Open offline, which don t worth the trouble.

IV. History:
2005.12.24  1.4      faster to detect if data changed by removing float point 
                     operations, added support to output CSV file in real time.
                     OutputCSVFile = 0 means no CSV.
                     OutputCSVFile = 1 means CSV + HST
                     OutputCSVFile = 2 CSV only, no HST .
                     (useful if you want to generate CSV for builtin periods)
                     CSV Filename will be the same as HST file except the extension.
                     added safe checking for PeriodMultiplier.
2005.12.04  1.3      Fixed missing data when there is large amount of data
                     loaded in several blocks, and support auto updating
                     when new history is loaded.
2005.11.29  1.2      Additional fix for missing data and server changing.
2005.11.29  1.1      Fixed missing partial data after restart.
                     Reinitialize after changing server or data corrupted.
2005.11.28  1.0      Initial release
*/


extern double  Version = 1.4;             // code version
extern string  BuildInfo = "2005.12.24 by This email address is being protected from spambots. You need JavaScript enabled to view it.";
extern int     PeriodMultiplier = 2;      // new period multiplier factor
extern int     OutputCSVFile = 0;         // also output CSV file?
extern int     UpdateInterval = 0;        // update interval in milliseconds, zero means update real-time.
extern bool    Enabled = true;
extern bool    Debug = false;

int      FileHandle = -1;
int      CSVHandle = -1;
int      NewPeriod = 0;

#define OUTPUT_HST_ONLY    0
#define OUTPUT_CSV_HST     1
#define OUTPUT_CSV_ONLY    2


#define  CHART_CMD_UPDATE_DATA            33324

void DebugMsg(string msg)
{
   if (Debug) Alert(msg);
}

int init()
{
   //safe checking for PeriodMultiplier.
   if (PeriodMultiplier  lt = 1) {
      //only output CSV file
      PeriodMultiplier = 1;
      OutputCSVFile = 2;
   }
   NewPeriod = Period() * PeriodMultiplier;
   if (OpenHistoryFile()  lt  0) return (-1);
   WriteHistoryHeader();
   UpdateHistoryFile(Bars-1, true);
   UpdateChartWindow();
   return (0);
}

void deinit()
{
   //Close file handle
   if(FileHandle  gt =  0) { 
      FileClose(FileHandle); 
      FileHandle = -1; 
   }
   if (CSVHandle  gt = 0) {
      FileClose(CSVHandle);
      CSVHandle = -1; 
   }
}


int OpenHistoryFile()
{
   string name;
   
   name = Symbol() + NewPeriod;
   if (OutputCSVFile != OUTPUT_CSV_ONLY) {
      FileHandle = FileOpenHistory(name + ".hst", FILE_BIN|FILE_WRITE);
      if (FileHandle  lt  0) return(-1);
   }
   if (OutputCSVFile != OUTPUT_HST_ONLY) {
      CSVHandle = FileOpen(name + ".csv", FILE_CSV|FILE_WRITE,  , );
      if (CSVHandle  lt  0) return(-1);
   }
   return (0);
}

int WriteHistoryHeader()
{
   string c_copyright;
   int    i_digits = Digits;
   int    i_unused[13] = {0};
   int    version = 400;   

   if (FileHandle  lt  0) return (-1);
   c_copyright = "(C)opyright 2003, MetaQuotes Software Corp.";
   FileWriteInteger(FileHandle, version, LONG_VALUE);
   FileWriteString(FileHandle, c_copyright, 64);
   FileWriteString(FileHandle, Symbol(), 12);
   FileWriteInteger(FileHandle, NewPeriod, LONG_VALUE);
   FileWriteInteger(FileHandle, i_digits, LONG_VALUE);
   FileWriteInteger(FileHandle, 0, LONG_VALUE);       //timesign
   FileWriteInteger(FileHandle, 0, LONG_VALUE);       //last_sync
   FileWriteArray(FileHandle, i_unused, 0, ArraySize(i_unused));
   return (0);
}


static double d_open, d_low, d_high, d_close, d_volume;
static int i_time;

void WriteHistoryData()
{
   if (FileHandle  gt = 0) {
      FileWriteInteger(FileHandle, i_time, LONG_VALUE);
      FileWriteDouble(FileHandle, d_open, DOUBLE_VALUE);
      FileWriteDouble(FileHandle, d_low, DOUBLE_VALUE);
      FileWriteDouble(FileHandle, d_high, DOUBLE_VALUE);
      FileWriteDouble(FileHandle, d_close, DOUBLE_VALUE);
      FileWriteDouble(FileHandle, d_volume, DOUBLE_VALUE);
   }
   if (CSVHandle  gt = 0) {
      int i_digits = Digits;
      
      FileWrite(CSVHandle,
         TimeToStr(i_time, TIME_DATE),
         TimeToStr(i_time, TIME_MINUTES),
         DoubleToStr(d_open, i_digits), 
         DoubleToStr(d_high, i_digits), 
         DoubleToStr(d_low, i_digits), 
         DoubleToStr(d_close, i_digits), 
         d_volume);
   }
}

int UpdateHistoryFile(int start_pos, bool init = false)
{
   static int last_fpos, csv_fpos;
   int i, ps;
      
//   if (FileHandle  lt  0) return (-1);
   // normalize open time
   ps = NewPeriod * 60;   
   i_time = Time[start_pos]/ps;
   i_time *=  ps;
   if (init) {
         //first time, init data
         d_open = Open[start_pos];
         d_low = Low[start_pos];
         d_high = High[start_pos];
         d_close = Close[start_pos];
         d_volume = Volume[start_pos];                           
         i = start_pos - 1;
         if (FileHandle  gt = 0) last_fpos = FileTell(FileHandle);
         if (CSVHandle  gt = 0) csv_fpos = FileTell(CSVHandle);
   } else {
         i = start_pos;
         if (FileHandle  gt = 0) FileSeek(FileHandle,last_fpos,SEEK_SET);
         if (CSVHandle  gt = 0) FileSeek(CSVHandle, csv_fpos, SEEK_SET);
   }
   if (i  lt  0) return (-1);

   int cnt = 0;
   int LastBarTime;
   //processing bars
   while (i  gt = 0) {
      LastBarTime = Time[i];

      //a new bar
      if (LastBarTime  gt =  i_time+ps) {
         //write the bar data
         WriteHistoryData();
         cnt++;
         i_time = LastBarTime/ps;
         i_time *= ps;
         d_open = Open[i];
         d_low = Low[i];
         d_high = High[i];
         d_close = Close[i];
         d_volume = Volume[i];
      } else {
         //no new bar
         d_volume +=  Volume[i];
         if (Low[i] lt d_low) d_low = Low[i];
         if (High[i] gt d_high) d_high = High[i];
         d_close = Close[i];      
      }
      i--;
   }
   
   //record last_fpos before writing last bar.
   if (FileHandle  gt = 0) last_fpos = FileTell(FileHandle);
   if (CSVHandle  gt = 0) csv_fpos = FileTell(CSVHandle);
   
   WriteHistoryData();
   cnt++;
   d_volume -=  Volume[0];
   
   //flush the data writen
   if (FileHandle  gt = 0) FileFlush(FileHandle);
   if (CSVHandle  gt = 0) FileFlush(CSVHandle);
   return (cnt);
}

int UpdateChartWindow()
{
   static int hwnd = 0;

   if (FileHandle  lt  0) {
      //no HST file opened, no need updating.
      return (-1);
   }
   if(hwnd == 0) {
      //trying to detect the chart window for updating
      hwnd = WindowHandle(Symbol(), NewPeriod);
   }
   if(hwnd!= 0) {
      if (IsDllsAllowed() == false) {
         //DLL calls must be allowed
         DebugMsg("Dll calls must be allowed");
         return (-1);
      }
      if (PostMessageA(hwnd,WM_COMMAND,CHART_CMD_UPDATE_DATA,0) == 0) {
         //PostMessage failed, chart window closed
         hwnd = 0;
      } else {
         //PostMessage succeed
         return (0);
      }
   }
   //window not found or PostMessage failed
   return (-1);
}

//| program start function                                           |
int start()

 

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