//+------------------------------------------------------------------+
//|                                                           T3.mq4 |
//|                                                           MojoFX |
//| http://groups.yahoo.com/group/MetaTrader_Experts_and_Indicators/ |
//+------------------------------------------------------------------+
#property copyright "MojoFX - Conversion only"
#property link      "http://groups.yahoo.com/group/MetaTrader_Experts_and_Indicators/"
//----
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Red
//----
extern int T3_Period=14;
extern double b=0.618;
//----
double t3Array[];
double e1,e2,e3,e4,e5,e6;
double c1,c2,c3,c4;
double n,w1,w2,b2,b3;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators setting
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,3,Red);
   SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,1,White);
//
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS));
   IndicatorShortName("Moving Average "+T3_Period);
//
   SetIndexBuffer(0,t3Array);
   SetIndexLabel(0,"T3 "+T3_Period);
//---- variable reset
   e1=0; e2=0; e3=0; e4=0; e5=0; e6=0;
   c1=0; c2=0; c3=0; c4=0;
   n=0;
   w1=0; w2=0;
   b2=0; b3=0;
//
   b2=b*b;
   b3=b2*b;
   c1=-b3;
   c2=(3*(b2+b3));
   c3=-3*(2*b2+b+b3);
   c4=(1+3*b+b3+3*b2);
   n=T3_Period;
//
   if(n<1) n=1;
   n=1+0.5*(n-1);
   w1=2/(n + 1);
   w2=1 - w1;
//----
   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;
   if(counted_bars==0) limit--;

//---- indicator calculation
   for(int i=limit; i>=0; i--)
     {
      e1=w1*Close[i] + w2*e1;
      e2=w1*e1 + w2*e2;
      e3=w1*e2 + w2*e3;
      e4=w1*e3 + w2*e4;
      e5=w1*e4 + w2*e5;
      e6=w1*e5 + w2*e6;
      //
      t3Array[i]=c1*e6+c2*e5+c3*e4+c4*e3;
     }
//----
   return(0);
  }
//+------------------------------------------------------------------+