//+------------------------------------------------------------------+
//|                                                     VininI_Cyber |
//|                                Copyright © 2009, Victor Nicolaev |
//|                                            e-mail: vinin@mail.ru |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2008, Victor Nicolaev"
#property link      "e-mail: vinin@mail.ru"

#property indicator_separate_window
#property indicator_buffers 3
#property indicator_color1 Yellow
#property indicator_color2 Green
#property indicator_color3 Red
#property indicator_level1  -0.5
#property indicator_level2   0
#property indicator_level3   0.5
#property indicator_minimum -1.05
#property indicator_maximum  1.05

//---- input parameters 

extern double alpha=0.01;
extern double betta=1.0;
extern int price_mode=4;

//---- buffers 

double Cycle[];
double Smonth[];
double iCycle[];
double Buy[];
double Sell[];

//+------------------------------------------------------------------+ 
//| Custom indicator initialization function | 
//+------------------------------------------------------------------+ 
int init() { 
   IndicatorBuffers(5);
   SetIndexBuffer(0, iCycle); 
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(1, Buy); 
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(2, Sell); 
   SetIndexStyle(2,DRAW_LINE);

   SetIndexBuffer(3, Smonth);
   SetIndexBuffer(4, Cycle);  



   return(0); 
}  

int deinit() { return(0); } 


//+------------------------------------------------------------------+ 
//| Custom indicator iteration function | 
//+------------------------------------------------------------------+ 
int start() { 
   int counted_bars = IndicatorCounted(); 

   if (counted_bars < 0) return(-1); 
   if (counted_bars > 0) counted_bars--;
   
   int limit=Bars - counted_bars;
   for(int i = limit; i >= 0; i--)    {
      Smonth[i]=(Price(i)+2.0*Price(i+1)+2.0*Price(i+2)+Price(i+3))/6.0;
   }
   for(i = limit; i >= 0; i--)    {
      Cycle[i]=betta*((1.0-0.5*alpha)*(1.0-0.5*alpha)*(Smonth[i]-2.0*Smonth[i+1]+Smonth[i+2])+2.0*(1.0-alpha)*Cycle[i+1]-(1.0-alpha)*(1.0-alpha)*Cycle[i+2]);
      iCycle[i]=(MathExp(2.0*Cycle[i])-1.0)/(MathExp(2.0*Cycle[i])+1.0);
      if (iCycle[i]>= 0.5) {Buy[i]=iCycle[i];Buy[i+1]=iCycle[i+1];}
      if (iCycle[i]<=-0.5) {Sell[i]=iCycle[i];Sell[i+1]=iCycle[i+1];}
   }

   return(0); 
} 
//+------------------------------------------------------------------+

double Price(int pos){
   switch (price_mode){
      case PRICE_CLOSE: return(Close[pos]);
      case PRICE_OPEN: return(Open[pos]);
      case PRICE_HIGH: return(High[pos]);
      case PRICE_LOW: return(Low[pos]);
      case PRICE_MEDIAN: return((High[pos]+Low[pos])/2.0); 
      case PRICE_TYPICAL: return((High[pos]+Low[pos]+Close[pos])/3.0);
      case PRICE_WEIGHTED: return((High[pos]+Low[pos]+Close[pos]+Close[pos])/4.0);
   }
}