ZigZag.new

//+------------------------------------------------------------------+
//|                                                       ZigZag.mq4 |
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"
#property indicator_chart_window
#property indicator_buffers  1
#property indicator_color1 Aquamarine
#property indicator_width1 0
#property indicator_style1 1
//---- 
extern int ExtDepth=6;
extern int ExtDeviation=3;
extern int ExtBackstep=2;
//---- 
//---- 
double ZigZagBuffer[];
//+------------------------------------------------------------------+
//| ZigZag initialization function                                   |
//+------------------------------------------------------------------+
int init()
  {
//---- 
   SetIndexBuffer(0,ZigZagBuffer); 
   SetIndexStyle(0,DRAW_SECTION);
   SetIndexEmptyValue(0,0.0);
   IndicatorShortName("ZigZag("+ExtDepth+","+ExtDeviation+","+ExtBackstep+")");
//---- 
   return(0);
  }
//+------------------------------------------------------------------+
//|  ZigZag iteration function                                       |
//+------------------------------------------------------------------+
int start()
  {
   //----+ ïðîâåðêà êîëè÷åñòâà áàðîâ íà äîñòàòî÷íîñòü äëÿ êîððåêòíîãî ðàñ÷¸òà èíäèêàòîðà
   if (Bars-1<ExtDepth)return(0);
   //----+ Ââåäåíèå öåëûõ ïåðåìåííûõ ïàìÿòè äëÿ ïåðåñ÷¸òà èíäèêàòîðà òîëüêî íà íåïîäñ÷èòàííûõ áàðàõ
   static int time2,time3,time4;  
   //----+ Ââåäåíèå ïåðåìåííûõ ñ ïëàâàþùåé òî÷êîé äëÿ ïåðåñ÷¸òà èíäèêàòîðà òîëüêî íà íåïîäñ÷èòàííûõ áàðàõ
   static  double ZigZag2,ZigZag3,ZigZag4;
   //----+ Ââåäåíèå öåëûõ ïåðåìåííûõ äëÿ ïåðåñ÷¸òà èíäèêàòîðà òîëüêî íà íåïîäñ÷èòàííûõ áàðàõ è ïîëó÷åíèå óæå ïîäñ÷èòàííûõ áàðîâ
   int MaxBar,limit,supr2_bar,supr3_bar,supr4_bar,counted_bars=IndicatorCounted();
   //---- ïðîâåðêà íà âîçìîæíûå îøèáêè
   if (counted_bars<0)return(-1);
   //---- ïîñëåäíèé ïîäñ÷èòàííûé áàð äîëæåí áûòü ïåðåñ÷èòàí
   if (counted_bars>0) counted_bars--;
   //----+ Ââåäåíèå ïåðåìåííûõ    
   int    shift, num, back,lasthighpos,lastlowpos;
   double val,res,TempBuffer[1];
   double curlow,curhigh,lasthigh,lastlow;
   //---- îïðåäåëåíèå íîìåðà ñàìîãî ñòàðîãî áàðà, íà÷èíàÿ ñ êîòîðîãî áóäåò ïðîèçåä¸í ïîëûé ïåðåñ÷¸ò âñåõ áàðîâ
   MaxBar=Bars-ExtDepth; 
   //---- îïðåäåëåíèå íîìåðà ñòàðòîâîãî  áàðà â öèêëå, íà÷èíàÿ ñ êîòîðîãî áóäåò ïðîèçåäèòüñÿ  ïåðåñ÷¸ò íîâûõ áàðîâ
   if (counted_bars==0)limit=MaxBar;
   else 
     {
      //----
      supr2_bar=iBarShift(NULL,0,time2,TRUE);
      supr3_bar=iBarShift(NULL,0,time3,TRUE);
      supr4_bar=iBarShift(NULL,0,time4,TRUE);
      //----
      limit=supr3_bar;      
      if ((supr2_bar<0)||(supr3_bar<0)||(supr4_bar<0))
         {
          limit=MaxBar;
          Print("Ñòàðòîâûé áàð íå íàéäåí, áóäåí ïðîèçâåä¸í ïåðåñ÷¸ò èíäèêàòîðà íà âñåõ áàðàõ" );
         }
     }
     
   //---- èíèöèàëèçàöèÿ íóëÿ
   if (limit>=MaxBar) 
     {
      for (shift=Bars-1; shift>=MaxBar;shift--)ZigZagBuffer [shift]=0.0; 
      limit=MaxBar; 
     } 
   //----  
   //---- èçìåíåíèå ðàçìåðà âðåìåííîãî áóôåðà
   if(ArrayResize(TempBuffer,limit+ExtBackstep+1)!=limit+ExtBackstep+1)return(-1);
     
   //----+-------------------------------------------------+ 
   
   //----+ íà÷àëî ïåðâîãî áîëüøîãî öèêëà
   for(shift=limit; shift>=0; shift--)
     {
      //---
      num=Lowest(NULL,0,MODE_LOW,ExtDepth,shift);
      val=Low[num];
      if(val==lastlow) val=0.0;
      else 
        { 
         lastlow=val; 
         if((Low[shift]-val)>(ExtDeviation*Point)) val=0.0;
         else
           {
            for(back=1; back<=ExtBackstep; back++)
              {
               res=ZigZagBuffer[shift+back];
               if((res!=0)&&(res>val)) ZigZagBuffer[shift+back]=0.0; 
              }
           }
        } 
      ZigZagBuffer[shift]=val;
      //--- 
      num=Highest(NULL,0,MODE_HIGH,ExtDepth,shift);
      val=High[num];
      if(val==lasthigh) val=0.0;
      else 
        {
         lasthigh=val;
         if((val-High[shift])>(ExtDeviation*Point)) val=0.0;
         else
           {
            for(back=1; back<=ExtBackstep; back++)
              {
               res=TempBuffer[shift+back];
               if((res!=0)&&(res<val)) TempBuffer[shift+back]=0.0; 
              } 
           }
        }
      TempBuffer[shift]=val;
     }
   //----+ êîíåö ïåðâîãî áîëüøîãî öèêëà 
      
   // final cutting 
      lasthigh=-1; lasthighpos=-1;
      lastlow= -1; lastlowpos= -1;
   //----+-------------------------------------------------+
   
   //----+ íà÷àëî âòîðîãî áîëüøîãî öèêëà

   for(shift=limit; shift>=0; shift--)
     {
      curlow=ZigZagBuffer[shift];
      curhigh=TempBuffer[shift];
      if((curlow==0)&&(curhigh==0)) continue;
      //---
      if(curhigh!=0)
        {
         if(lasthigh>0) 
           {
            if(lasthigh<curhigh) TempBuffer[lasthighpos]=0;
            else TempBuffer[shift]=0;
           }
         //---
         if(lasthigh<curhigh || lasthigh<0)
           {
            lasthigh=curhigh;
            lasthighpos=shift;
           }
         lastlow=-1;
        }
      //----
      if(curlow!=0)
        {
         if(lastlow>0)
           {
            if(lastlow>curlow) ZigZagBuffer[lastlowpos]=0;
            else ZigZagBuffer[shift]=0;
           }
         //---
         if((curlow<lastlow)||(lastlow<0))
           {
            lastlow=curlow;
            lastlowpos=shift;
           } 
         lasthigh=-1;
        }
     }
   //----+ êîíåö âòîðîãî áîëüøîãî öèêëà
     
   //----+-------------------------------------------------+
   
   //----+ íà÷àëî òðåòüåãî öèêëà
   for(shift=limit; shift>=0; shift--)
     {
       res=TempBuffer[shift];
       if(res!=0.0) ZigZagBuffer[shift]=res;
     }
     //----+ êîíåö òðåòüåãî öèêëà
     
   //+--- Âîññòàíîâëåíèå çíà÷åíèé èíäèêàòîðíîãî áóôôåðà, êîòîðûå ìîãëè áûòü óòåðÿíû 
   if (limit<MaxBar)
     {
      ZigZagBuffer[supr2_bar]=ZigZag2; 
      ZigZagBuffer[supr3_bar]=ZigZag3; 
      ZigZagBuffer[supr4_bar]=ZigZag4; 
      for(int qqq=supr4_bar-1; qqq>supr3_bar; qqq--)ZigZagBuffer[qqq]=0; 
      for(int ggg=supr3_bar-1; ggg>supr2_bar; ggg--)ZigZagBuffer[ggg]=0;
     }
   //+---+============================================+
  
   //+--- èñïðàâëåíèå âîçíèêàþùèõ ãîðáîâ 
   double vel1, vel2, vel3, vel4;
   int bar1, bar2, bar3, bar4;
   int count;
   if (limit==MaxBar)supr4_bar=MaxBar;
   for(int bar=supr4_bar; bar>=0; bar--)
    {
     if (ZigZagBuffer[bar]!=0)
      {
       count++;
       vel4=vel3;bar4=bar3;
       vel3=vel2;bar3=bar2;
       vel2=vel1;bar2=bar1;
       vel1=ZigZagBuffer[bar];bar1=bar;
       if (count<3)continue; 
       if ((vel3<vel2)&&(vel2<vel1))ZigZagBuffer[bar2]=0;
       if ((vel3>vel2)&&(vel2>vel1))ZigZagBuffer[bar2]=0;
       if ((vel2==vel1)&&(vel1!=0 ))ZigZagBuffer[bar1]=0;      
     }
    } 
   //+--- çàïîìèíàíèå âðåìåíè òð¸õ ïîñëåäíèõ ïåðåãèáîâ Çèãçàãà è çíà÷åíèé èíäèêàòîðà â ýòèõ òî÷êàõ 
   time2=Time[bar2];
   time3=Time[bar3];
   time4=Time[bar4];
   ZigZag2=vel2;  
   ZigZag3=vel3; 
   ZigZag4=vel4; 
   //+---          
 //---- çàâåðøåíèå âû÷èñëåíèé çíà÷åíèé èíäèêàòîðà
return(0);
}
 //---+ +---------------------------------------------------------------------+