sStochastic

//+------------------------------------------------------------------+
//|                                                  sStochastic.mq4 |
//|                      Copyright © 2004, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"
//----
#property indicator_separate_window
#property indicator_minimum 0
#property indicator_maximum 100
#property indicator_buffers 2
#property indicator_color1 LightSeaGreen
#property indicator_color2 Red
//---- input parameters
extern int KPeriod = 5;
extern int DPeriod = 3;
extern int Slowing = 3;
//---- buffers
double MainBuffer[];
double SignalBuffer[];
double HighesBuffer[];
double LowesBuffer[];
//----
int draw_begin1 = 0;
int draw_begin2 = 0;
//---- Íîìåð áàðà, ïî êîòîðîìó áóäåò èñêàòüñÿ ñèãíàë
#define SIGNAL_BAR 1
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   string short_name;
//---- 2 additional buffers are used for counting.
   IndicatorBuffers(4);
   SetIndexBuffer(2, HighesBuffer);
   SetIndexBuffer(3, LowesBuffer);
//---- indicator lines
   SetIndexStyle(0, DRAW_LINE);
   SetIndexBuffer(0, MainBuffer);
   SetIndexStyle(1, DRAW_LINE);
   SetIndexBuffer(1, SignalBuffer);
//---- name for DataWindow and indicator subwindow label
   short_name="sSto(" + KPeriod + "," + DPeriod + "," + Slowing + ")";
   IndicatorShortName(short_name);
   SetIndexLabel(0, short_name);
   SetIndexLabel(1, "Signal");
//----
   draw_begin1 = KPeriod+Slowing;
   draw_begin2 = draw_begin1+DPeriod;
   SetIndexDrawBegin(0, draw_begin1);
   SetIndexDrawBegin(1, draw_begin2);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Stochastic oscillator                                            |
//+------------------------------------------------------------------+
int start()
  {
   int    i, k;
   int    counted_bars = IndicatorCounted();
   double price;
//----
   if(Bars <= draw_begin2) 
       return(0);
//---- initial zero
   if(counted_bars < 1)
     {
       for(i = 1; i <= draw_begin1; i++) 
           MainBuffer[Bars-i] = 0;
       for(i = 1; i <= draw_begin2; i++) 
           SignalBuffer[Bars-i] = 0;
     }
//---- minimums counting
   i = Bars - KPeriod;
   if(counted_bars > KPeriod) 
       i = Bars - counted_bars - 1;
   while(i >= 0)
     {
       double min = 1000000;
       k = i + KPeriod - 1;
       while(k >= i)
         {
           price = Low[k];
           if(min > price) 
               min = price;
           k--;
         }
       LowesBuffer[i] = min;
       i--;
     }
//---- maximums counting
   i = Bars - KPeriod;
   if(counted_bars > KPeriod) 
       i = Bars - counted_bars - 1;
   while(i >= 0)
     {
       double max = -1000000;
       k = i + KPeriod - 1;
       while(k >= i)
         {
           price = High[k];
           if(max < price) 
               max = price;
           k--;
         }
       HighesBuffer[i] = max;
       i--;
     }
//---- %K line
   i = Bars - draw_begin1;
   if(counted_bars > draw_begin1) 
       i = Bars - counted_bars - 1;
   while(i >= 0)
     {
       double sumlow = 0.0;
       double sumhigh = 0.0;
       for(k = (i + Slowing - 1); k >= i; k--)
         {
           sumlow += Close[k] - LowesBuffer[k];
           sumhigh += HighesBuffer[k] - LowesBuffer[k];
         }
       if(sumhigh == 0.0) 
           MainBuffer[i] = 100.0;
       else 
           MainBuffer[i] = sumlow / sumhigh*100;
       i--;
     }
//---- last counted bar will be recounted
   if(counted_bars > 0) 
       counted_bars--;
   int limit = Bars - counted_bars;
//---- signal line is simple movimg average
   for(i = 0; i < limit; i++)
       SignalBuffer[i] = iMAOnArray(MainBuffer, Bars, DPeriod, 0, MODE_SMA, i);
//---- 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(MainBuffer[SIGNAL_BAR] - 30.0 > 0 && 30.0 - MainBuffer[SIGNAL_BAR+1] >= 0)
		       {
			        PrevSignal = 1;
			        Alert("sStochastic (", Symbol(), ", ", Period(), ")  -  BUY!!!");
		       }
	    }
	  if(PrevSignal >= 0)
	    {
		     if(70.0 - MainBuffer[SIGNAL_BAR] > 0 && MainBuffer[SIGNAL_BAR+1] - 70.0 >= 0)
		       {
			        PrevSignal = -1;
			        Alert("sStochastic (", Symbol(), ", ", Period(), ")  -  SELL!!!");
		       }
	    }
//----
   return(0);
  }
//+------------------------------------------------------------------+