//+------------------------------------------------------------------+
//|                                           Trix Trend Cycle 2.mq4 |
//|                                                            Knoxy |
//+------------------------------------------------------------------+
#property copyright "Knoxy"
#property link      ""

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1  Red

//
//
//
//
//
extern int TrixPeriod = 4;
extern int TrendCycle = 4;

//
//
//
//
//

double stcBuffer[];
double trix_buffer1[];
double trix_buffer2[];
double trix_buffer3[];
double cdBuffer[];
double fastKBuffer[];
double fastDBuffer[];
double fastKKBuffer[];


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//
//
//
//

int init()
{
   IndicatorBuffers(8);
      SetIndexBuffer(0,stcBuffer);
      SetIndexBuffer(1,trix_buffer1);
      SetIndexBuffer(2,trix_buffer2);
      SetIndexBuffer(3,trix_buffer3);
      SetIndexBuffer(4,cdBuffer);
      SetIndexBuffer(5,fastKBuffer);
      SetIndexBuffer(6,fastDBuffer);
      SetIndexBuffer(7,fastKKBuffer);
   IndicatorShortName("Trix TC2 ("+TrixPeriod+","+TrendCycle+")");
   return(0);
}

int deinit()
{
   return(0);
}

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//
//
//
//

int start()
{
   double alphaCD      = 2.0 / (1.0 + 3.0);
   int    counted_bars = IndicatorCounted();
   int    limit,i;

   if(counted_bars < 0) return(-1);
   if(counted_bars>0) counted_bars--;
         limit = Bars-counted_bars;

   //
   //
   //
   //
   //

  for(i=0; i<limit; i++) trix_buffer1[i]=iMA(NULL,0,TrixPeriod,0,MODE_SMMA,(PRICE_CLOSE+PRICE_HIGH+PRICE_LOW),i);
  for(i=0; i<limit; i++) trix_buffer2[i]=iMAOnArray(trix_buffer1,0,TrixPeriod,0,MODE_SMMA,i);
  for(i=0; i<limit; i++) trix_buffer3[i]=iMAOnArray(trix_buffer2,0,TrixPeriod,0,MODE_EMA,i);
   //
   //
   //
   
   for(i = limit; i >= 0; i--)
   {

      cdBuffer[i]   = cdBuffer[i+1]+alphaCD*(trix_buffer3[i]-trix_buffer3[i+1]);

      //
      //
      //
      //
      //
      
      double lowCd  = minValue(cdBuffer,i);
      double highCd = maxValue(cdBuffer,i)-lowCd;
         if (highCd > 0)
               fastKBuffer[i] = 100*((cdBuffer[i]-lowCd)/highCd);
         else  fastKBuffer[i] = fastKBuffer[i+1];
               fastDBuffer[i] = fastDBuffer[i+1]+0.5*(fastKBuffer[i]-fastDBuffer[i+1]);
               
      //
      //
      //
      //
      //
                     
      double lowStoch  = minValue(fastDBuffer,i);
      double highStoch = maxValue(fastDBuffer,i)-lowStoch;
         if (highStoch > 0)
               fastKKBuffer[i] = 100*((fastDBuffer[i]-lowStoch)/highStoch);
         else  fastKKBuffer[i] = fastKKBuffer[i+1];
               stcBuffer[i]    = stcBuffer[i+1]+0.5*(fastKKBuffer[i]-stcBuffer[i+1]);
   }   
   return(0);
}


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//
//
//
//

double minValue(double& array[],int shift)
{
   double minValue = array[shift];
            for (int i=1; i<TrendCycle; i++) minValue = MathMin(minValue,array[shift+i]);
   return(minValue);
}
double maxValue(double& array[],int shift)
{
   double maxValue = array[shift];
            for (int i=1; i<TrendCycle; i++) maxValue = MathMax(maxValue,array[shift+i]);
   return(maxValue);
}