_Channel@MA

#property indicator_chart_window // â îêíå èíñòðóìåíòà
#property indicator_buffers 5
#property indicator_color1 Magenta // çèãçàã
#property indicator_color3 Green // âåðõí. ãð. êàíàëà
#property indicator_color4 Red // íèæí. ãð. êàíàëà
#property indicator_color5 Blue // MA
// âõîäíûå ïàðàìåòðû
extern double Sensitivity=5; // ïîðîã ÷óâñòâ. â ï.ï.
extern int ma_period=5; // ïåðèîä MA
extern int ma_method=0; // 0-SMA, 1-EMA, 2-SMMA, 3-LWMA
extern int applied_price=0; // 0-CLOSE, 1-OPEN, 2-HIGH, 3-LOW, 4-MEDIAN, 5-TYPICAL, 6-WEIGHTED
extern int ShowChannel=2; // ïîêàçàòü 1 - ïî ìåñòó ýêñòðåìóìîâ, 2 - ïî âðåìåíè îïðåäåëåíèÿ
extern int ShowZigZag=0; // ïîêàçàòü 1 - ïî ìåñòó ýêñòðåìóìîâ, 2 - ïî âðåìåíè îïðåäåëåíèÿ
// èíä.áóôåðû
double   ZZpeak[], // ïèê
         ZZtrough[], // âïàäèíà
         ChTop[], // âåðõí. ãð. êàíàëà
         ChBot[], // íèæí. ãð. êàíàëà
         MA[]; // MA
// îáùèå ïåðåìåííûå
double sens; // ÷óâñòâ. â öåíàõ
bool dir;
double tx,px,bot,top;
int jDn,jUp; // ñ÷åò÷èêè ðàññòîÿíèÿ ìåæäó ýêñòðåìóìàìè
bool count=1; // íàïðàâëåíèå ïîèñêà öåíîâîãî ýêñòðåìóìà; 1 - îò ñòàðøèõ áàðîâ ê ìëàäøèì
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   if(ShowZigZag<0 || ShowChannel<0) count=0;
   ShowZigZag=MathAbs(ShowZigZag); ShowChannel=MathAbs(ShowChannel);

   sens=Sensitivity*Point; // ÷óâñòâ. â öåíàõ
//---- indicators
   SetIndexBuffer(0,ZZpeak);
   SetIndexEmptyValue(0,0.0);
   SetIndexLabel(0,"Peak");
   
   SetIndexBuffer(1,ZZtrough);
   SetIndexEmptyValue(1,0.0);
   SetIndexLabel(1,"Trough");
   
   if(ShowZigZag>0) {
      SetIndexStyle(0,DRAW_ZIGZAG);
      SetIndexStyle(1,DRAW_ZIGZAG);
     }
   else {      
      SetIndexStyle(0,DRAW_NONE);
      SetIndexStyle(1,DRAW_NONE);
     }

   SetIndexBuffer(2,ChTop);
   SetIndexEmptyValue(2,0.0);
   SetIndexStyle(2,DRAW_LINE);
   SetIndexLabel(2,"ChTop");

   SetIndexBuffer(3,ChBot);
   SetIndexEmptyValue(3,0.0);
   SetIndexStyle(3,DRAW_LINE);
   SetIndexLabel(3,"ChBot");

   if(ShowChannel>0) {
      SetIndexStyle(2,DRAW_LINE);
      SetIndexStyle(3,DRAW_LINE);
     }
   else {      
      SetIndexStyle(2,DRAW_NONE);
      SetIndexStyle(3,DRAW_NONE);
     }

   SetIndexBuffer(4,MA);
   SetIndexStyle(4,DRAW_LINE);
   string _ma="MA("+ma_period+") "+ma_method+", "+applied_price;
   SetIndexLabel(4,_ma);

//----
   IndicatorShortName("ZZ@MA"); 

   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int ic=IndicatorCounted();
   if(Bars-ic-1>1) ic=reinit();
   int limit=Bars-ic-1; // êîë-âî ïåðåñ÷åòîâ

   for(int i=limit; i>=0; i--) MA[i]=iMA(NULL,0,ma_period,0,ma_method,applied_price, i); 

   for(i=limit; i>0; i--)
     {
      double c=MA[i];
      jDn++; jUp++; // ñ÷åò÷èêè ðàññòîÿíèÿ ìåæäó ýêñòðåìóìàìè
      //------------- Ëîâëÿ âïàäèíû -------------------------------------------         
      if(dir)                      // Åñëè ôëàã=1, òî ëîâèì âïàäèíó
        {
//         if(l>Low[i]) {l=Low[i]; jt=0;} 
         tx=MathMin(tx,c);
         if(c >= tx+sens)           // Åñëè öåíà ñòàëà áîëüøå ïîñëåäíåãî ìèíèìóìà çà ïîðîã, òî
           {
            double l=High[i]*100;
            if(count) {for(int k=jUp; k>=0; k--) if(Low[i+k]<l) {int sh=i+k;l=Low[i+k];}}
            else {for(k=0; k<=jUp; k++) if(Low[i+k]<l) {sh=i+k;l=Low[i+k];}}
            bot=Low[sh];
            if(ShowZigZag==1) ZZtrough[sh]=bot; else ZZtrough[i]=bot;
            if(ShowChannel==1) for(k=sh; k>i; k--) ChBot[k]=bot;
            px=c;                   
            dir=0;                 // ôëàã óñòàíîâëåí "ïîéìàíà âïàäèíà"
            jDn=-2;
           }
        }
      //------------- Ëîâëÿ ïèêà -----------------------------------------         
      else                          // Åñëè ôëàã=0, òî ëîâèì ïèê
        {
         px=MathMax(px,c);
         if(c <= px-sens)           // Åñëè öåíà ñòàëà ìåíüøå ïîñëåäíåãî ìàêñèìóìà çà ïîðîã, òî
           {
            tx=c;
            double h=0;
            if(count) {for(k=jDn; k>=0; k--) if(High[i+k]>h) {sh=i+k; h=High[i+k];}}
            else {for(k=0; k<=jDn; k++) if(High[i+k]>h) {sh=i+k; h=High[i+k];}}
            top=High[sh];
            if(ShowZigZag==1) ZZpeak[sh]=top; else ZZpeak[i]=top;
            if(ShowChannel==1) for(k=sh; k>i; k--) ChTop[k]=top;
            dir=1;                 // ôëàã "ïîéìàí ïèê"
            jUp=-2; 
           }
        }
      //--------------------------------------------------------------------
      for(k=0; k<2; k++) {ChTop[i-k]=top; ChBot[i-k]=bot;}
     }
        
   return(0);
  }


// ô-ÿ äîïîëíèòåëüíîé èíèöèàëèçàöèè
int reinit()
  {
   ArrayInitialize(ZZpeak,0.0);
   ArrayInitialize(ZZtrough,0.0);
   ArrayInitialize(ChTop,0.0);
   ArrayInitialize(ChBot,0.0);
   ArrayInitialize(MA,0.0);
   dir=0; tx=0;px=0;top=0;bot=0;jUp=0;jDn=0;
   return(0);
  }