//+------------------------------------------------------------------+
//|                                                       ProMoy.mq4 |
//|                                              Copyright 2016, AM2 |
//|                                      http://www.forexsystems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright 2016, AM2"
#property link      "http://www.forexsystems.biz"
#property version   "1.00"
#property strict
#property indicator_chart_window

extern int Count = 4;  //баров для расчета
extern int Delta = 50; // 

int b=0,s=0;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping

//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void PutArrow(double price,int code,color clr)
  {
   string name="Arrow"+TimeToStr(Time[0]);
//--- создадим стрелку
   ObjectCreate(0,name,OBJ_ARROW,0,Time[1],price);
//--- установим код стрелки
   ObjectSetInteger(0,name,OBJPROP_ARROWCODE,code);
//--- установим цвет стрелки
   ObjectSetInteger(0,name,OBJPROP_COLOR,clr);
//--- установим размер стрелки
   ObjectSetInteger(0,name,OBJPROP_WIDTH,1);
  }
//+------------------------------------------------------------------+
void PutHLine(string name,double price,color clr)
  {
   ObjectDelete(name);
   ObjectCreate(0,name,OBJ_HLINE,0,0,price);
   ObjectSetInteger(0,name,OBJPROP_COLOR,clr);
   ObjectSetInteger(0,name,OBJPROP_WIDTH,1);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---
   int Shift=iBarShift(NULL,0,StringToTime("00:00"));
   double Max = High[iHighest(NULL,0,MODE_HIGH,Count,Shift)];
   double Min = Low[iLowest(NULL,0,MODE_LOW,Count,Shift)];

   PutHLine("UP",Max,Red);
   PutHLine("DN",Min,Blue);

   if(DayOfWeek()>1)
     {
      if(Bid-Max>=Delta*Point && b==0)
        {
         PutArrow(Bid,233,Aqua);
         Alert(Symbol()+" UP Proboy!");
         b=1;
         s=0;
        }

      if(Min-Bid>=Delta*Point && s==0)
        {
         PutArrow(Bid,234,Red);
         Alert(Symbol()+" DN Proboy!");
         b=0;
         s=1;
        }
     }
     
   Comment("\n Shift: ",Shift,
           "\n Max: ",Max,
           "\n Min: ",Min);

//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

дельта это для чего нужно?