SHI_Mod_vLine

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Author: Copyright � 2004, Shurka & Kevin
SHI_Mod_vLine

Overview of the Tool Logic

This script is designed to automatically identify and project trend channels on a trading chart. It accomplishes this by locating specific price structures—known as fractals—and using them as anchor points to draw parallel lines that represent the prevailing market direction.

Here is a step-by-step breakdown of how the logic operates:

1. Dynamic Anchor Point Selection

Instead of relying on fixed dates, the script uses a vertical line (a "marker") on the chart to determine your starting point. It looks at the specific bar where you have placed this line and calculates all necessary data from that point backward. This allows you to manually choose which part of the market history you want the tool to analyze.

2. Fractal Identification

The script searches for "fractals," which are significant high or low points in price action. It automatically adjusts its search sensitivity based on the timeframe you are using (e.g., it looks for different patterns on a 1-minute chart versus a 4-hour chart). Once it finds two opposing fractals—a peak and a trough—it uses these as the foundation for the channel.

3. Mathematical Channel Construction

Once the two anchor points are identified, the script performs several calculations:

  • Step Calculation: It determines the "slope" or the rate of price change between the two points.
  • Parallel Lines: It projects two main trend lines (the upper and lower boundaries) based on that slope.
  • Median Line: It calculates a third, dotted line in the exact middle of the channel to help identify the central equilibrium of the price action.

4. Smart Adjustment Logic

The script includes "protection" logic to ensure the channel remains accurate. If it detects that the price has moved beyond the boundaries of the calculated channel in a way that suggests a trend break or a crossover, it attempts to refine the projection. It specifically looks for extreme points to ensure the lines remain relevant to the current market structure rather than becoming distorted by minor price fluctuations.

5. Visual Projection

Finally, the tool renders these lines on your chart:

  • Primary Channel: Drawn as solid lines in a distinct color (Tomato) to show the active range.
  • Extended Projections: It draws "forecast" lines (Lime) that extend into the future based on the established slope. These help traders visualize where the channel might continue if the current trend persists.
  • Visual Feedback: It places labels and a dotted vertical line to clearly indicate which specific price points were used to generate the current drawing.
Miscellaneous
Implements a curve of type %1Uses files from the file systemIt reads information from a fileIt issuies visual alerts to the screen
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SHI_Mod_vLine 
//+------------------------------------------------------------------+
//|                                                SHI_Mod_vLine.mq4 |
//|                               Copyright © 2004,   Shurka & Kevin |
//|                            Corrected&Upgraded by  Modest         |
//|                                  Additional idea  Rosh           |
//+------------------------------------------------------------------+
// Modest- èñïðàâëåí àëãîðèòì íàõîæäåíèÿ îïîðíîé òî÷êè ìåæäó 
// îáíàðóæåííûìè ôðàêòàëàìè äëÿ ïîñòðîåíèÿ ëèíèè êàíàëà
// Äîáàâëåíà âîçìîæíîñòü òåñòèðîâàíèÿ íà èñòîðèè ïðè ïîìîùè ïðîãðàììû MetaClick.
// Ïðè òåñòèðîâàíèè ëèíèè êàíàëà ïðîäîëæàþòñÿ â áóäóøåå
// Âåðñèÿ SHI_Mod_vLine: ïåðåìåùåíèå âñåãî ïîñòðîåíèÿ ïóòåì ïåðåòàñêèâàíèÿ VLINE -èäåÿ Rosh'a
#property copyright "Copyright © 2004, Shurka & Kevin "
#property link      ""
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Red
double ExtMapBuffer1[];
double UpLabel[];

extern int       BarsForFract=0;
extern bool      DOT_Line_Ray=True;
int CurrentBar=0;
double Step=0;
int B1=-1,B2=-1,iB1=0,iB2=0,flag=0;
int UpDown=0;
double P1=0,P2=0,PP=0,P1f=0,PPf=0;
int i=0,AB=300,BFF=0;
int ishift=0;
double iprice=0;
datetime T1,T2,Tf,myTime;
string fileNAME;
int myYear,myMonth,myDay,myHour,myMinute;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0,DRAW_ARROW);
   SetIndexArrow(0,164);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexEmptyValue(0,0.0);

    SetIndexStyle(1,DRAW_ARROW,EMPTY,1,Blue);
    SetIndexBuffer(1,UpLabel);
    SetIndexArrow(1, 251);
    SetIndexEmptyValue(1,0);
	
	   
	
	
	
   return(0);
  }
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 
   FileDelete(fileNAME);
//----
   return(0);
  }

void DelObj()
{
	ObjectDelete("TL1");	ObjectDelete("TL2");	ObjectDelete("MIDL");
   ObjectDelete("Lab1");ObjectDelete("Lab2");ObjectDelete("Lab3");
   ObjectDelete("TL1f");ObjectDelete("TL2f");
   //ObjectDelete("MyBarLine");
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+

int start()
  {
   double iPP,Lab1Val,Lab2Val,Lab3Val;
   int MyBar,lastBarTime,h1,ii;
   string v1,fileFrame;
      
      ObjectCreate("MyBarLine",OBJ_VLINE,0,Time[1],High[1]); 
      ObjectSet("MyBarLine",OBJPROP_COLOR,Aqua); 
		ObjectSet("MyBarLine",OBJPROP_WIDTH,1); 
		ObjectSet("MyBarLine",OBJPROP_STYLE,STYLE_DOT);    
   
   
//****************************************************************************************  
//   ×òåíèå äàííûõ (ñòðîêà)  èç âíåøíåãî ôàéëà, ñôîðìèðîâàííîãî ïðîãðàììîé MetaClick,    
//   ïóò¸ì òûêà â áàð (Z+LeftMouse) óêàçûâàþùåé âðåìÿ, äî êîòîðîãî ñòðîèòñÿ èíäèêàòîð.
//   Èùåì íóæíûé íîìåð áàðà
//**************************************************************************************** 
 /*   // Âýòîé âåðñèè MetaClick íå èñïîëüçóåòñÿ
        switch (Period())  // Ôîðìèðîâàíèå ÷àñòè èìåíè âíåøíåãî ôàéëà
      {
      case PERIOD_M1:     fileFrame=",M1";break;
      case PERIOD_M5:     fileFrame=",M5";break;
      case PERIOD_M15:    fileFrame=",M15";break;
      case PERIOD_M30:    fileFrame=",M30";break;
      case PERIOD_H1:     fileFrame=",H1";break;
	   case PERIOD_H4:     fileFrame=",H4";break;
	   case PERIOD_D1:     fileFrame=",Daily";break;
	   case PERIOD_W1:     fileFrame=",Weekly";break;
	   case PERIOD_MN1:    fileFrame=",Monthly";break;   
      }
      fileNAME=Symbol()+fileFrame+".csv";
      h1=FileOpen(Symbol()+fileFrame+".csv",FILE_CSV,";");
      v1 = FileReadString(h1);
      FileClose(h1);
      Comment(v1);
      lastBarTime=StrToTime(v1);
      i=0;
      while (i<=Bars-1 )
      {if (lastBarTime==Time[i])
         { MyBar=i;break;}
      i++;
      }
*/
//**^^^*****^^ Çàêîí÷èëè èñêàòü ïîñëåäíèé áàð äëÿ ïîñòðîåíèÿ èíäèêàòîðà **************** 
   
   
   
   
   myTime=ObjectGet("MyBarLine",OBJPROP_TIME1);
   if(myTime>Time[0] || myTime< Time[Bars-1])  
   {ObjectDelete("MyBarLine"); Alert("SHI_Mod_vLine: TimeFrames are not correct");  return(0);  }
   myYear=TimeYear(myTime); myMonth=TimeMonth(myTime);myDay=TimeDay(myTime);
   myHour=TimeHour(myTime); myMinute=TimeMinute(myTime);
   
   // Äëÿ âîçìîæíîòè ïåðåêëþ÷åíèÿ òàéìôðåéìîâ ÎÄÍÎÃÎ È ÒÎÃÎ ÆÅ ÃÐÀÔÈÊÀ íàäî âûðîâíÿòü
   // âðåìÿ ðàñïîëîæåíèÿ âåðòèêàëüíîé ëèíèè íà ãðàíèöó ñòàðøåãî òàéìôðåéìà.
   if (Period()==PERIOD_MN1 || Period()==PERIOD_W1) 
      {Alert("SHI_Mod_vLine can''t work with Weekly and Monthly charts"); 
        ObjectDelete("MyBarLine"); return(0);}
   
   switch (Period())  // 
      {
      case PERIOD_M1:     break;
      case PERIOD_M5:     myMinute=MathFloor(myMinute/5)*5; break;
      case PERIOD_M15:    myMinute=MathFloor(myMinute/15)*15; break;
      case PERIOD_M30:    myMinute=MathFloor(myMinute/30)*30; break;
      case PERIOD_H1:     myMinute=0; break;
	   case PERIOD_H4:     myHour=MathFloor(myHour/4)*4; myMinute=0; break;
	   case PERIOD_D1:     myHour=0; myMinute=0; break;
	   case PERIOD_W1:     /*i=0; while(i<=Bars-1) 
	                       {
	                          if (TimeYear(Time[i])==myYear && TimeMonth(Time[i])==myMonth &&
	                              myDay-TimeDay(Time[i])<=6 && myDay-TimeDay(Time[i])>=0)
	                              myDay=TimeDay(Time[i]);  break; 
	                          i++;  //Íåïðàâèëüíî!!
	                       }*/
	                       break;
	   case PERIOD_MN1:    break;   
      }
      
      ObjectDelete("MyBarLine");
      
   
   myTime=StrToTime(myYear + "." + myMonth + "." + myDay + " "  + myHour + ":" + myMinute);
      
      ObjectCreate("MyBarLine",OBJ_VLINE,0,myTime,High[0]); 
      ObjectSet("MyBarLine",OBJPROP_COLOR,Aqua); 
		ObjectSet("MyBarLine",OBJPROP_WIDTH,1); 
		ObjectSet("MyBarLine",OBJPROP_STYLE,STYLE_DOT);  
   //Îòëàäêà
   /*
   Alert(myYear + "." + myMonth + "." + myDay + " "  + myHour + ":" + myMinute);
   myYear=TimeYear(myTime); myMonth=TimeMonth(myTime);myDay=TimeDay(myTime);
   myHour=TimeHour(myTime); myMinute=TimeMinute(myTime);
   Alert(myYear + "." + myMonth + "." + myDay + " "  + myHour + ":" + myMinute);
   */
   
   //return(0);
   
   
   i=0;
   while(Time[i]!=myTime) {i++;}
   MyBar=i;
   
   ArrayInitialize(UpLabel,0.0);
   if (Bars<MyBar+303) {Alert("Too little history");return(-1);}
   int    counted_bars=IndicatorCounted();
//---- 
	//if(Bars<AllBars)  AllBars=Bars;                 //return(-1);
	//if(AllBars<AB) {Comment("Ìàëî áàðîâ"); return(-1);}
	//Alert("MyBar=",MyBar);
	//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+MyBar; //ñ÷èòàåì ñ òðåòüåãî áàðà, ÷òîáû ôðàêòàë "çàêðåïèëñÿ
	B1=-1; B2=-1; UpDown=0; flag=0;
	
	while(((B1==-1) || (B2==-1)) && (CurrentBar<(AB+MyBar)))
	{
		//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 (CurrentBar==4 ) Alert("CurrentBar=",CurrentBar," ","BFF=",BFF);
		
		if((UpDown<1) && (CurrentBar==Lowest(Symbol(),Period(),MODE_LOW,BFF*2+1,CurrentBar-BFF))) 
	// Âûðàæåíèå CurrentBar-BFF ìîæåò áûòü â äàí ñëó÷àå îòðèöàòåëüíûì. Íî âðîäå ðàáîòàåò
	
		{
		  if(UpDown==0) { UpDown=-1; B1=CurrentBar; iB1=CurrentBar; P1=Low[B1];}
			else { B2=CurrentBar; iB2=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; iB1=CurrentBar; P1=High[B1];}
			else { B2=CurrentBar; iB2=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-MyBar)*Step; B1=0+MyBar;//ïåðåñòàâëÿåì öåíó è ïåðâûé áàð ê íóëþ (çíà÷åíèå îïîðíîé ëèíèè íà 0 áàðå)
	
	//À òåïåðü îïîðíóþ òî÷êó ïðîòèâîïîëîæíîé ëèíèè êàíàëà.
	ishift=0+MyBar; iprice=0;
	
	//Alert(UpDown);
	if(UpDown==1)
	{ 
		//  Èñïðàâëåíî!!  Îïîðíóþ òî÷êó áóäåì èñêàòü ÌÅÆÄÓ îáíàðóæåííûìè ôðàêòàëàìè,
		//  à íå ñ 0-ãî (MyBar) áàðà. iB1-ýòî íå èçìåíåííûé B1
		
		//PP=Low[2+MyBar]-(2)*Step;
				
		PP=Low[2+iB1]-(2)*Step;
		iPP=Low[2+iB1]-(2)*Step;
		ii=2+iB1;
		//for(i=3+MyBar;i<=B2;i++) 
		for(i=3+iB1;i<=B2;i++) 
		{
			//if(Low[i]<PP+Step*(i-MyBar)) { PP=Low[i]-(i-MyBar)*Step; ii=i;}
		    if(Low[i]<iPP+Step*(i-iB1)) 
		       //PP-çíà÷åíèå ëèíèè íà ïîñëåäíåì áàðå
		       // iPP-çíà÷åíèå ëèíèè íà áàðå iB1 -ïðàâûé ôðàêòàë
		       { PP=Low[i]-(i-MyBar)*Step; ii=i;
		        iPP=Low[i]-(i-iB1)*Step;  
		       }
		}
		
		//Alert(iB1,"  ",iB2,"  ",ii,"  ","Step=",Step,"  ","PP=",PP);
		//Lab1Val=(High[iB1]+5*Point); 	Lab2Val=(High[iB2]+5*Point); 	Lab3Val=(Low[ii]-5*Point);
		UpLabel[iB1]=High[iB1]+5*Point;
		UpLabel[iB2]=High[iB2]+5*Point;
		UpLabel[ii]=Low[ii]-5*Point;
		
		//Alert(iB1,"  ",ii,"  ",iB2,"  ","Step=",Step,"  ","PP=",PP,"  ","Lab1Val=",Lab1Val);

		
		if(Low[0+MyBar]<PP) {ishift=0+MyBar; iprice=PP;}
		if(Low[1+MyBar]<PP+Step) {ishift=1+MyBar; iprice=PP+Step;}
		if(High[0+MyBar]>P1) {ishift=0+MyBar; iprice=P1;}
		if(High[1+MyBar]>P1+Step) {ishift=1+MyBar; iprice=P1+Step;}
	} 
	else  //òðåíä âíèç
	{ 
		PP=High[2+MyBar]-(2)*Step;
		iPP=High[2+iB1]-(2)*Step;
		ii=2+iB1;
		//for(i=3+MyBar;i<=B2;i++) 
		for(i=3+iB1;i<=B2;i++)  
		{
			if(High[i]>iPP+Step*(i-iB1)) { PP=High[i]-(i-MyBar)*Step;ii=i;
			                                 iPP=High[i]-(i-iB1)*Step;
			                               } //èùåì çíà÷åíèå âåðõíåé ëèíèè íà 0 áàðå
		}
		
		//Lab1Val=(Low[iB1]-5*Point);Lab2Val=(Low[iB2]-5*Point);Lab3Val=(High[ii]+5*Point);
		UpLabel[iB1]=Low[iB1]-5*Point;
		UpLabel[iB2]=Low[iB2]-5*Point;
		UpLabel[ii]=High[ii]+5*Point;
		
		
		
		//Alert(iB1,"  ",iB2,"  ","ii=",ii,"  ","Step=",Step,"  ","PP=",PP,"  ",
		//       "Lab1Val=",Lab1Val,"Lab3Val=",Lab3Val);
		
		// îïðåäåëÿåì, áûëî ëè ïåðåñå÷åíèå ëèíèé êàíàëà íà 0 èëè 1 áàðàõ(÷òîáû ñòàâèòü ïñèñó)
		if(Low[0+MyBar]<P1) {ishift=0+MyBar; iprice=P1;}
		if(Low[1+MyBar]<P1+Step) {ishift=1+MyBar; iprice=P1+Step;}
		if(High[0+MyBar]>PP) {ishift=0+MyBar; iprice=PP;}
		if(High[1+MyBar]>PP+Step) {ishift=1+MyBar; 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+MyBar];

	//Åñëè íå áûëî ïåðåñå÷åíèÿ êàíàëà, òî 0, èíà÷å ñòàâèì ïñèñó.
	//if(iprice!=0) ExtMapBuffer1[ishift]=iprice;
	DelObj();
	
	//Alert("B1=",B1,"  ","B2=",AB+MyBar,"    ","AB=",AB,"  ","MyBar=",MyBar);
//	Alert("T1=",T1,"  ","T2=",T2);

//***************************************** Ðèñóåì ëèíèè êàíàëà ************************
	ObjectCreate("TL1",OBJ_TREND,0,T2,PP+Step*(AB),T1,PP); 
		ObjectSet("TL1",OBJPROP_COLOR,Tomato); 
		ObjectSet("TL1",OBJPROP_WIDTH,2); 
		ObjectSet("TL1",OBJPROP_STYLE,STYLE_SOLID); 
      ObjectSet("TL1",OBJPROP_RAY,False); 
	ObjectCreate("TL2",OBJ_TREND,0,T2,P2,T1,P1); 
		ObjectSet("TL2",OBJPROP_COLOR,Tomato); 
		ObjectSet("TL2",OBJPROP_WIDTH,2); 
		ObjectSet("TL2",OBJPROP_STYLE,STYLE_SOLID); 
	   ObjectSet("TL2",OBJPROP_RAY,False); 
	ObjectCreate("MIDL",OBJ_TREND,0,T2,(P2+PP+Step*AB)/2,T1,(P1+PP)/2);
		ObjectSet("MIDL",OBJPROP_COLOR,Tomato); 
		ObjectSet("MIDL",OBJPROP_WIDTH,1); 
		ObjectSet("MIDL",OBJPROP_STYLE,STYLE_DOT); 
      ObjectSet("MIDL",OBJPROP_RAY,DOT_Line_Ray); 

//*********************************** Ðèñóåì ïðîäîëæåíèå êàíàëà ************************
     if (MyBar>30) {Tf=Time[MyBar-30]; 
                     PPf=PP-Step*30; P1f=P1-Step*30;
                   }
     else          {Tf=Time[0];PPf=PP-Step*MyBar; P1f=P1-Step*MyBar; 
                   }
    ObjectCreate("TL1f",OBJ_TREND,0,T1,PP,Tf,PPf); 
		ObjectSet("TL1f",OBJPROP_COLOR,Lime); 
		ObjectSet("TL1f",OBJPROP_WIDTH,1); 
		ObjectSet("TL1f",OBJPROP_STYLE,STYLE_DOT); 
      ObjectSet("TL1f",OBJPROP_RAY,DOT_Line_Ray); 
    ObjectCreate("TL2f",OBJ_TREND,0,T1,P1,Tf,P1f); 
		ObjectSet("TL2f",OBJPROP_COLOR,Lime); 
		ObjectSet("TL2f",OBJPROP_WIDTH,1); 
		ObjectSet("TL2f",OBJPROP_STYLE,STYLE_DOT); 
      ObjectSet("TL2f",OBJPROP_RAY,DOT_Line_Ray); 
    
//************************* Îòìå÷àåì êëèêíóòûé áàð  ************************************    
   /*if (MyBar>0)    
      {
      ObjectCreate("MyBarLine",OBJ_VLINE,0,Time[MyBar],High[MyBar]); 
      ObjectSet("MyBarLine",OBJPROP_COLOR,MediumOrchid); 
		ObjectSet("MyBarLine",OBJPROP_WIDTH,1); 
		ObjectSet("MyBarLine",OBJPROP_STYLE,STYLE_DOT); 
      }
   */
   
//----
   return(0);
  }
//+------------------------------------------------------------------+

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