mfi_htf

//+------------------------------------------------------------------+ 
//|                                                      MFI_HTF.mq5 | 
//|                               Copyright © 2014, Nikolay Kositsin | 
//|                              Khabarovsk,   farria@mail.redcom.ru | 
//+------------------------------------------------------------------+ 
#property copyright "Copyright © 2014, Nikolay Kositsin"
#property link "farria@mail.redcom.ru" 
//--- íîìåð âåðñèè èíäèêàòîðà
#property version   "1.60"
//--- îòðèñîâêà èíäèêàòîðà â îòäåëüíîì îêíå
#property indicator_separate_window 
//--- êîëè÷åñòâî èíäèêàòîðíûõ áóôåðîâ 2
#property indicator_buffers 2 
//--- èñïîëüçîâàíî îäíî ãðàôè÷åñêîå ïîñòðîåíèå
#property indicator_plots   1
//+----------------------------------------------+
//|  Ïàðàìåòðû îòðèñîâêè èíäèêàòîðà              |
//+----------------------------------------------+
//--- îòðèñîâêà èíäèêàòîðà â âèäå ÷åòûð¸õöâåòíîé ãèñòîãðàììû
#property indicator_type1 DRAW_COLOR_HISTOGRAM
//--- â êà÷åñòâå öâåòîâ ÷åòûð¸õöâåòíîé ãèñòîãðàììû èñïîëüçîâàíû
#property indicator_color1 clrRed,clrPurple,clrGray,clrTeal,clrLime
//--- ëèíèÿ èíäèêàòîðà - ñïëîøíàÿ
#property indicator_style1 STYLE_SOLID
//--- òîëùèíà ëèíèè èíäèêàòîðà ðàâíà 5
#property indicator_width1 5
//--- îòîáðàæåíèå ìåòêè èíäèêàòîðà
#property indicator_label1 "MFI HTF"
//+----------------------------------------------+
//| Ïàðàìåòðû îòîáðàæåíèÿ ãîðèçîíòàëüíûõ óðîâíåé |
//+----------------------------------------------+
#property indicator_level1 +20.0
#property indicator_level2   0.0
#property indicator_level3 -20.0
#property indicator_levelcolor clrBlue
#property indicator_levelstyle STYLE_DASHDOTDOT
//+----------------------------------------------+
//| îáúÿâëåíèå êîíñòàíò                          |
//+----------------------------------------------+
#define RESET 0 // Êîíñòàíòà äëÿ âîçâðàòà òåðìèíàëó êîìàíäû íà ïåðåñ÷¸ò èíäèêàòîðà
//+----------------------------------------------+
//| Âõîäíûå ïàðàìåòðû èíäèêàòîðà                 |
//+----------------------------------------------+
input ENUM_TIMEFRAMES TimeFrame=PERIOD_H4;         // Ïåðèîä ãðàôèêà
input int Length=8;                                // Ïåðèîä èíäèêàòîðà 
input ENUM_APPLIED_VOLUME VolumeType=VOLUME_TICK;  // Îáú¸ì 
input bool ReDraw=true;                            // Ïîâòîð îòîáðàæåíèÿ èíôîìàöèè íà ïóñòûõ áàðàõ
//+----------------------------------------------+
//--- îáúÿâëåíèå ïåðåìåííîé äëÿ õðàíåíèÿ ðåçóëüòàòà èíèöèàëèçàöèè èíäèêàòîðà
bool Init;
//--- îáúÿâëåíèå öåëî÷èñëåííûõ ïåðåìåííûõ íà÷àëà îòñ÷¸òà äàííûõ
int min_rates_total;
//--- îáúÿâëåíèå öåëî÷èñëåííûõ ïåðåìåííûõ äëÿ õåíäëîâ èíäèêàòîðîâ
int MFI_Handle;
//--- îáúÿâëåíèå äèíàìè÷åñêèõ ìàññèâîâ, êîòîðûå áóäóò â 
//--- â äàëüíåéøåì èñïîëüçîâàíû â êà÷åñòâå èíäèêàòîðíûõ áóôåðîâ
double MFIBuffer[],ColorMFIBuffer[];
//+------------------------------------------------------------------+
//|  Ïîëó÷åíèå ñòðèíãîâîãî òàéìôðåéìà                                |
//+------------------------------------------------------------------+
string GetStringTimeframe(ENUM_TIMEFRAMES timeframe)
  {
//---
   return(StringSubstr(EnumToString(timeframe),7,-1));
//---
  }
//+------------------------------------------------------------------+    
//| MFI indicator initialization function                            | 
//+------------------------------------------------------------------+  
void OnInit()
  {
//--- èíèöèàëèçàöèÿ ïåðåìåííûõ íà÷àëà îòñ÷¸òà äàííûõ
   min_rates_total=3;
   Init=true;
//--- ïðîâåðêà ïåðèîäîâ ãðàôèêîâ íà êîððåêòíîñòü
   if(TimeFrame<Period() && TimeFrame!=PERIOD_CURRENT)
     {
      Print("Ïåðèîä ãðàôèêà äëÿ èíäèêàòîðà iMFI íå ìîæåò áûòü ìåíüøå ïåðèîäà òåêóùåãî ãðàôèêà");
      Init=false;
      return;
     }
//--- ïîëó÷åíèå õåíäëà èíäèêàòîðà  iMFI
   MFI_Handle=iMFI(Symbol(),TimeFrame,Length,VolumeType);
   if(MFI_Handle==INVALID_HANDLE)
     {
      Print(" Íå óäàëîñü ïîëó÷èòü õåíäë èíäèêàòîðà  iMFI");
      Init=false;
      return;
     }
//--- ïðåâðàùåíèå äèíàìè÷åñêîãî ìàññèâà MFIBuffer â èíäèêàòîðíûé áóôåð
   SetIndexBuffer(0,MFIBuffer,INDICATOR_DATA);
//--- îñóùåñòâëåíèå ñäâèãà íà÷àëà îòñ÷¸òà îòðèñîâêè èíäèêàòîðà
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,min_rates_total);
//--- ñîçäàíèå ìåòêè äëÿ îòîáðàæåíèÿ â DataWindow
   PlotIndexSetString(0,PLOT_LABEL," MFI HTF");
//--- óñòàíîâêà çíà÷åíèé èíäèêàòîðà, êîòîðûå íå áóäóò âèäèìû íà ãðàôèêå
   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,EMPTY_VALUE);
//--- èíäåêñàöèÿ ýëåìåíòîâ â áóôåðå êàê â òàéìñåðèè
   ArraySetAsSeries(MFIBuffer,true);
//--- ïðåâðàùåíèå äèíàìè÷åñêîãî ìàññèâà â öâåòîâîé, èíäåêñíûé áóôåð   
   SetIndexBuffer(1,ColorMFIBuffer,INDICATOR_COLOR_INDEX);
//--- èíäåêñàöèÿ ýëåìåíòîâ â áóôåðå êàê â òàéìñåðèè
   ArraySetAsSeries(ColorMFIBuffer,true);
//--- èíèöèàëèçàöèè ïåðåìåííîé äëÿ êîðîòêîãî èìåíè èíäèêàòîðà
   string shortname;
   StringConcatenate(shortname," MFI HTF(",GetStringTimeframe(TimeFrame),")");
//--- ñîçäàíèå èìåíè äëÿ îòîáðàæåíèÿ â îòäåëüíîì ïîäîêíå è âî âñïëûâàþùåé ïîäñêàçêå
   IndicatorSetString(INDICATOR_SHORTNAME,shortname);
//--- îïðåäåëåíèå òî÷íîñòè îòîáðàæåíèÿ çíà÷åíèé èíäèêàòîðà
   IndicatorSetInteger(INDICATOR_DIGITS,0);
//--- çàâåðøåíèå èíèöèàëèçàöèè
  }
//+------------------------------------------------------------------+  
//| MFI iteration function                                           | 
//+------------------------------------------------------------------+  
int OnCalculate(const int rates_total,    // êîëè÷åñòâî èñòîðèè â áàðàõ íà òåêóùåì òèêå
                const int prev_calculated,// êîëè÷åñòâî èñòîðèè â áàðàõ íà ïðåäûäóùåì òèêå
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//--- ïðîâåðêà êîëè÷åñòâà áàðîâ íà äîñòàòî÷íîñòü äëÿ ðàñ÷¸òà
   if(rates_total<min_rates_total || !Init) return(RESET);
   if(BarsCalculated(MFI_Handle)<Bars(Symbol(),TimeFrame)) return(prev_calculated);
//--- îáúÿâëåíèå öåëî÷èñëåííûõ ïåðåìåííûõ
   int limit,bar;
//--- îáúÿâëåíèå ïåðåìåííûõ ñ ïëàâàþùåé òî÷êîé  
   double MFI[2];
   datetime MFITime[1];
   static uint LastCountBar;
//--- ðàñ÷¸òû íåîáõîäèìîãî êîëè÷åñòâà êîïèðóåìûõ äàííûõ è
//--- è ñòàðòîâîãî íîìåðà limit äëÿ öèêëà ïåðåñ÷¸òà áàðîâ
   if(prev_calculated>rates_total || prev_calculated<=0)// ïðîâåðêà íà ïåðâûé ñòàðò ðàñ÷¸òà èíäèêàòîðà
     {
      limit=rates_total-min_rates_total-1; // ñòàðòîâûé íîìåð äëÿ ðàñ÷¸òà âñåõ áàðîâ
      LastCountBar=rates_total;
     }
   else limit=int(LastCountBar)+rates_total-prev_calculated; // ñòàðòîâûé íîìåð äëÿ ðàñ÷¸òà íîâûõ áàðîâ 
//--- èíäåêñàöèÿ ýëåìåíòîâ â ìàññèâàõ êàê â òàéìñåðèÿõ  
   ArraySetAsSeries(time,true);
//--- îñíîâíîé öèêë ðàñ÷¸òà èíäèêàòîðà
   for(bar=limit; bar>=0 && !IsStopped(); bar--)
     {
      //--- îáíóëèì ñîäåðæèìîå èíäèêàòîðíûõ áóôåðîâ äî ðàñ÷¸òà
      MFIBuffer[bar]=EMPTY_VALUE;
      ColorMFIBuffer[bar]=0;
      //--- êîïèðóåì âíîâü ïîÿâèâøèåñÿ äàííûå â ìàññèâ
      if(CopyTime(Symbol(),TimeFrame,time[bar],1,MFITime)<=0) return(RESET);

      if(time[bar]>=MFITime[0] && time[bar+1]<MFITime[0])
        {
         LastCountBar=bar;
         //--- êîïèðóåì âíîâü ïîÿâèâøèåñÿ äàííûå â ìàññèâû
         if(CopyBuffer(MFI_Handle,0,time[bar],2,MFI)<=0) return(RESET);
         //--- çàãðóçêà ïîëó÷åííûõ çíà÷åíèé â èíäèêàòîðíûå áóôåðû
         MFIBuffer[bar]=MFI[1]-50.0;
         //---
         if(MFIBuffer[bar]>0)
           {
            if(MFI[1]>MFI[0]) ColorMFIBuffer[bar]=4;
            if(MFI[1]<MFI[0]) ColorMFIBuffer[bar]=3;
           }
         //---
         if(MFIBuffer[bar]<0)
           {
            if(MFI[1]<MFI[0]) ColorMFIBuffer[bar]=0;
            if(MFI[1]>MFI[0]) ColorMFIBuffer[bar]=1;
           }
        }
      //---
      if(ReDraw)
        {
         if(MFIBuffer[bar+1]!=EMPTY_VALUE && MFIBuffer[bar]==EMPTY_VALUE)
           {
            MFIBuffer[bar]=MFIBuffer[bar+1];
            ColorMFIBuffer[bar]=ColorMFIBuffer[bar+1];
           }
        }
     }
//---     
   return(rates_total);
  }
//+------------------------------------------------------------------+