SHI_Channel_true_v3

//+------------------------------------------------------------------+
//|                                             SHI_Channel_true.mq4 |
//|                                 Copyright © 2004, Shurka & Kevin |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, Shurka & Kevin"
#property link      ""
//----
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Red
double ExtMapBuffer1[];
//---- input parameters
extern int AllBars = 240;
extern int BarsForFract = 0;
int    CurrentBar = 0;
double Step = 0;
int    B1 = -1, B2 = -1;
int    UpDown = 0;
double P1 = 0, P2 = 0, PP = 0;
int    i = 0, AB = 300, BFF = 0;
int    ishift = 0;
double iprice = 0;
datetime T1, T2;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0, DRAW_ARROW);
   SetIndexArrow(0, 164);
   SetIndexBuffer(0, ExtMapBuffer1);
   SetIndexEmptyValue(0, 0.0);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
	  ObjectDelete("TL1");
	  ObjectDelete("TL2");
	  ObjectDelete("MIDL");
	  Comment(" ");
//----
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void DelObj()
  {
	  ObjectDelete("TL1");
	  ObjectDelete("TL2");
	  ObjectDelete("MIDL");
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int counted_bars = IndicatorCounted();
//---- 
	  if((AllBars == 0) || (Bars < AllBars)) 
	      AB = Bars; 
	  else AB = AllBars; //AB-êîëè÷åñòâî îáñ÷èòûâàåìûõ áàðîâ
	  if(BarsForFract > 0) 
		     BFF = BarsForFract; 
	  else
		     switch (Period())
		       {
			        case     1: BFF = 12; break;
			        case     5: BFF = 48; break;
			        case    15: BFF = 24; break;
			        case    30: BFF = 24; break;
			        case    60: BFF = 12; break;
			        case   240: BFF = 15; break;
			        case  1440: BFF = 10; break;
			        case 10080: BFF = 6;  break;
			        default: DelObj(); return(-1); break;
		       }
   CurrentBar = 2; //ñ÷èòàåì ñ òðåòüåãî áàðà, ÷òîáû ôðàêòàë "çàêðåïèëñÿ
   B1 = -1; 
   B2 = -1; 
   UpDown = 0;
   while(((B1 == -1) || (B2==-1)) && (CurrentBar<AB))
     {
		     //UpDown = 1 çíà÷èò ïåðâûé ôðàêòàë íàéäåí ñâåðõó, UpDown = -1 çíà÷èò ïåðâûé ôðàêòàë
		     //íàéäåí ñíèçó, UpDown = 0 çíà÷èò ôðàêòàë åù¸ íå íàéäåí.
		     //Â1 è Â2 - íîìåðà áàðîâ ñ ôðàêòàëàìè, ÷åðåç íèõ ñòðîèì îïîðíóþ ëèíèþ.
		     //Ð1 è Ð2 - ñîîòâåòñòâåííî öåíû ÷åðåç êîòîðûå áóäåì ëèíèþ ïðîâîäèòü
		     if((UpDown < 1) && (CurrentBar == Lowest(Symbol(), Period(), MODE_LOW, BFF*2 + 1,
		        CurrentBar - BFF))) 
		       {
			        if(UpDown == 0) 
			          { 
			            UpDown = -1; 
			            B1 = CurrentBar; 
			            P1 = Low[B1]; 
			          }
			        else 
			          { 
			            B2 = CurrentBar; 
			            P2 = Low[B2];
			          }
		       }
		     if((UpDown > -1) && (CurrentBar == Highest(Symbol(), Period(), MODE_HIGH, BFF*2 + 1,
		        CurrentBar - BFF))) 
		       {
			        if(UpDown == 0) 
			          { 
			            UpDown = 1; 
			            B1 = CurrentBar; 
			            P1 = High[B1]; 
			          }
			        else 
			          { 
			            B2 = CurrentBar; 
			            P2 = High[B2]; 
			          }
		       }
		     CurrentBar++;
	    }
	  if((B1 == -1) || (B2 == -1)) 
	    {
	      DelObj(); 
	      return(-1);
	    } // Çíà÷èò íå íàøëè ôðàêòàëîâ ñðåäè 300 áàðîâ 8-)
	  Step = (P2 - P1) / (B2 - B1); //Âû÷èñëèëè øàã, åñëè îí ïîëîæèòåëüíûé, òî êàíàë íèñõîäÿùèé
	  P1 = P1 - B1*Step; 
	  B1 = 0; //ïåðåñòàâëÿåì öåíó è ïåðâûé áàð ê íóëþ
//À òåïåðü îïîðíóþ òî÷êó ïðîòèâîïîëîæíîé ëèíèè êàíàëà.
	  ishift = 0; 
	  iprice = 0;
	  if(UpDown == 1)
	    { 
		     PP = Low[2] - 2*Step;
		     for(i = 3; i <= B2; i++) 
		       {
			        if(Low[i] < PP + Step*i) 
			            PP = Low[i] - i*Step; 
		       }
		     if(Low[0] < PP) 
		       {
		         ishift = 0; 
		         iprice = PP;
		       }
		     if(Low[1] < PP + Step) 
		       {
		         ishift = 1; 
		         iprice = PP + Step;
		       }
		     if(High[0] > P1) 
		       {
		         ishift = 0; 
		         iprice = P1;
		       }
		     if(High[1] > P1 + Step) 
		       {
		         ishift = 1; 
		         iprice = P1 + Step;
		       }
	    } 
	  else
	    { 
		     PP = High[2] - 2*Step;
		     for(i = 3; i <= B2; i++) 
		       {
			        if(High[i] > PP + Step*i) 
			            PP = High[i] - i*Step;
		       }
		     if(Low[0] < P1) 
		       {
		         ishift = 0; 
		         iprice = P1;
		       }
		     if(Low[1] < P1 + Step) 
		       {
		         ishift = 1; 
		         iprice = P1 + Step;
		       }
		     if(High[0] > PP) 
		       {
		         ishift = 0; 
		         iprice = PP;
		       }
		     if(High[1] > PP + Step) 
		       {
		         ishift = 1; 
		         iprice = PP + Step;
		       }
	    }
//Òåïåðü ïåðåñòàâèì êîíå÷íóþ öåíó è áàð íà ÀÂ, ÷òîáû ëèíèè êàíàëà ðèñîâàëèñü ïîäëèííåå
	  P2 = P1 + AB*Step;
	  T1 = Time[B1]; 
	  T2 = Time[AB];
//Åñëè íå áûëî ïåðåñå÷åíèÿ êàíàëà, òî 0, èíà÷å ñòàâèì ïñèñó.
	  if(iprice != 0) 
	      ExtMapBuffer1[ishift] = iprice;
	  DelObj();
	  ObjectCreate("TL1", OBJ_TREND, 0, T2, PP + Step*AB, T1, PP); 
		 ObjectSet("TL1", OBJPROP_COLOR, Lime); 
		 ObjectSet("TL1", OBJPROP_WIDTH, 2); 
		 ObjectSet("TL1", OBJPROP_STYLE, STYLE_SOLID); 
	  ObjectCreate("TL2", OBJ_TREND, 0, T2, P2, T1, P1); 
		 ObjectSet("TL2", OBJPROP_COLOR, Lime); 
		 ObjectSet("TL2", OBJPROP_WIDTH, 2); 
		 ObjectSet("TL2", OBJPROP_STYLE, STYLE_SOLID); 
	  ObjectCreate("MIDL", OBJ_TREND, 0, T2, (P2 + PP + Step*AB) / 2, T1, (P1 + PP) / 2);
		 ObjectSet("MIDL", OBJPROP_COLOR, Lime); 
		 ObjectSet("MIDL", OBJPROP_WIDTH, 1); 
		 ObjectSet("MIDL", OBJPROP_STYLE, STYLE_DOT);
		 Comment(" Channel size = ", DoubleToStr(MathAbs(PP - P1) / Point, 0), " Slope = ", 
		         DoubleToStr(-Step / Point, 2));
//----
   return(0);
  }
//+------------------------------------------------------------------+