i-GAP

//+------------------------------------------------------------------+
//|                                                        i-GAP.mq4 |
//|                                           Êèì Èãîðü Â. aka KimIV |
//|                                              http://www.kimiv.ru |
//|                                                                  |
//| 04.11.2005  Èíäèêàòîð ÃÝÏîâ                                      |
//+------------------------------------------------------------------+
#property copyright "Êèì Èãîðü Â. aka KimIV"
#property link      "http://www.kimiv.ru"
//----
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 LightBlue
#property indicator_color2 Salmon
//------- Âíåøíèå ïàðàìåòðû èíäèêàòîðà -------------------------------
extern int SizeGAP     =5;      // Ðàçìåð ÃÝÏà
extern int NumberOfBars=10000;  // Êîëè÷åñòâî áàðîâ îáñ÷¸òà (0-âñå)
//------- Ãëîáàëüíûå ïåðåìåííûå --------------------------------------
int ArrowInterval;
//------- Ïîêëþ÷åíèå âíåøíèõ ìîäóëåé ---------------------------------
//------- Áóôåðû èíäèêàòîðà ------------------------------------------
double SigBuy[];
double SigSell[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
  void init() 
  {
   SetIndexBuffer(0, SigBuy);
   SetIndexStyle (0, DRAW_ARROW);
   SetIndexArrow (0, 233);
   SetIndexEmptyValue(0, EMPTY_VALUE);
   //
   SetIndexBuffer(1, SigSell);
   SetIndexStyle (1, DRAW_ARROW);
   SetIndexArrow (1, 234);
   SetIndexEmptyValue(1, EMPTY_VALUE);
   ArrowInterval=GetArrowInterval();
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
  void start() 
  {
   double ms[2];
   int    LoopBegin, sh;
//----
   if (NumberOfBars==0) LoopBegin=Bars-1;
   else LoopBegin=NumberOfBars-1;
//----
     for(sh=LoopBegin; sh>=0; sh--) 
     {
      ms[0]=EMPTY_VALUE;
      ms[1]=EMPTY_VALUE;
      GetSignals(sh, ms);
      SigBuy[sh]=ms[0];
      SigSell[sh]=ms[1];
     }
  }
//+------------------------------------------------------------------+
//| Âîçâðàùàåò ñèãíàëû                                               |
//+------------------------------------------------------------------+
  void GetSignals(int nb, double& ms[]) 
  {
   double Cl1=Close[nb+1];
   double Op0=Open [nb];
//----
   if (Cl1>Op0+SizeGAP*Point) ms[0]=Low[nb]-ArrowInterval*Point;
   if (Cl1<Op0-SizeGAP*Point) ms[1]=High[nb]+ArrowInterval*Point;
  }
//+------------------------------------------------------------------+
//| Âîçâðàùàåò èíòåðâàë óñòàíîâêè ñèãíàëüíûõ óêàçàòåëåé              |
//+------------------------------------------------------------------+
  int GetArrowInterval() 
  {
   int p=Period();
     switch(p) 
     {
         case 1:     return(3);
         case 5:     return(5);
         case 15:    return(7);
         case 30:    return(10);
         case 60:    return(15);
         case 240:   return(20);
         case 1440:  return(50);
         case 10080: return(100);
         case 43200: return(200);
        }
     }
//+------------------------------------------------------------------+