sAccelerator

//+------------------------------------------------------------------+
//|                                                 sAccelerator.mq4 |
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property  copyright "Copyright © 2005, MetaQuotes Software Corp."
#property  link      "http://www.metaquotes.net/"
//---- indicator settings
#property  indicator_separate_window
#property  indicator_buffers 3
#property  indicator_color1  Black
#property  indicator_color2  Green
#property  indicator_color3  Red
//---- indicator buffers
double ExtBuffer0[];
double ExtBuffer1[];
double ExtBuffer2[];
double ExtBuffer3[];
double ExtBuffer4[];
// Íîìåð áàðà, ïî êîòîðîìó áóäåò èñêàòüñÿ ñèãíàë
#define SIGNAL_BAR 1
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- 2 additional buffers are used for counting.
   IndicatorBuffers(5);
//---- drawing settings
   SetIndexStyle(0, DRAW_NONE);
   SetIndexStyle(1, DRAW_HISTOGRAM);
   SetIndexStyle(2, DRAW_HISTOGRAM);
   IndicatorDigits(Digits + 2);
   SetIndexDrawBegin(0, 38);
   SetIndexDrawBegin(1, 38);
   SetIndexDrawBegin(2, 38);
//---- 4 indicator buffers mapping
   SetIndexBuffer(0, ExtBuffer0);
   SetIndexBuffer(1, ExtBuffer1);
   SetIndexBuffer(2, ExtBuffer2);
   SetIndexBuffer(3, ExtBuffer3);
   SetIndexBuffer(4, ExtBuffer4);
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("sAC");
   SetIndexLabel(1, NULL);
   SetIndexLabel(2, NULL);
//---- initialization done
   return(0);
  }
//+------------------------------------------------------------------+
//| Accelerator/Decelerator Oscillator                               |
//+------------------------------------------------------------------+
int start()
  {
   int    limit;
   int    counted_bars = IndicatorCounted();
   double prev, current;
//---- last counted bar will be recounted
   if(counted_bars > 0) 
       counted_bars--;
   limit = Bars - counted_bars;
//---- macd counted in the 1-st additional buffer
   for(int i = 0; i < limit; i++)
       ExtBuffer3[i] = iMA(NULL, 0, 5, 0, MODE_SMA, PRICE_MEDIAN, i) - 
                       iMA(NULL, 0, 34, 0, MODE_SMA, PRICE_MEDIAN, i);
//---- signal line counted in the 2-nd additional buffer
   for(i = 0; i < limit; i++)
       ExtBuffer4[i] = iMAOnArray(ExtBuffer3, Bars, 5, 0, MODE_SMA, i);
//---- dispatch values between 2 buffers
   bool up = true;
   for(i = limit - 1; i >= 0; i--)
     {
       current = ExtBuffer3[i] - ExtBuffer4[i];
       prev = ExtBuffer3[i+1] - ExtBuffer4[i+1];
       if(current > prev) 
           up = true;
       if(current < prev) 
           up = false;
       if(!up)
         {
           ExtBuffer2[i] = current;
           ExtBuffer1[i] = 0.0;
         }
       else
         {
           ExtBuffer1[i] = current;
           ExtBuffer2[i] = 0.0;
         }
       ExtBuffer0[i] = current;
     }
//---- done
//---- Ñòàòè÷åñêèå ïåðåìåííûå, â êîòîðûõ õðàíÿòñÿ
//---- âðåìÿ ïîñëåäíåãî áàðà è íàïðàâëåíèå ïîñëåäíåãî ñèãíàëà
	  static int PrevSignal = 0, PrevTime = 0;
//---- Åñëè áàðîì äëÿ àíàëèçà âûáðàí íå 0-é, íàì íåò ñìûñëà ïðîâåðÿòü ñèãíàë
//---- íåñêîëüêî ðàç. Åñëè íå íà÷àëñÿ íîâûé áàð, âûõîäèì.
	  if(SIGNAL_BAR > 0 && Time[0] <= PrevTime ) 
	      return(0);
//---- Îòìå÷àåì, ÷òî ýòîò áàð ïðîâåðåí
	  PrevTime = Time[0];
//---- Åñëè ïðåäûäóùèé ñèãíàë áûë ÑÅËË èëè ýòî ïåðâûé çàïóñê (PrevSignal=0)
	  if(PrevSignal <= 0)
	    {
		     if(ExtBuffer0[SIGNAL_BAR] - ExtBuffer0[SIGNAL_BAR+1] > 0 &&
				      ExtBuffer0[SIGNAL_BAR+2] - ExtBuffer0[SIGNAL_BAR+1] > 0 )
		       {
			        PrevSignal = 1;
			        Alert("sAC (", Symbol(), ", ", Period(), ")  -  BUY!!!");
		       }
	    }
	  if(PrevSignal >= 0)
	    {
		     if(ExtBuffer0[SIGNAL_BAR+1] - ExtBuffer0[SIGNAL_BAR] > 0 &&
				      ExtBuffer0[SIGNAL_BAR+1] - ExtBuffer0[SIGNAL_BAR+2] > 0)
		       {
			        PrevSignal = -1;
			        Alert("sAC (", Symbol(), ", ", Period(), ")  -  SELL!!!");
		       }
	    }
   return(0);
  }
//+------------------------------------------------------------------+