Laguerre_PlusDi

//+--------------------------------------------------------------------------+
//| Laguerre PlusDi.mq4                                                      |
//| Emerald King / transport_david                                           |
//| http://finance.groups.yahoo.com/group/MetaTrader_Experts_and_Indicators/ |
//+--------------------------------------------------------------------------+
#property copyright "Copyright © 2005"
#property link      "http://finance.groups.yahoo.com/group/MetaTrader_Experts_and_Indicators/"
//----
#property indicator_separate_window
#property indicator_minimum -0.05
#property indicator_maximum 1.05
#property indicator_buffers 1
#property indicator_color1 LawnGreen
#property indicator_level2 0.75
#property indicator_level3 0.50
#property indicator_level4 0.25
//---- input parameters
extern int periods=14;
extern int timeperiods=0;
extern double gamma=0.764;
extern int CountBars=300;
//----
double L0=0;
double L1=0;
double L2=0;
double L3=0;
double L0A=0;
double L1A=0;
double L2A=0;
double L3A=0;
double LRSI=0;
double CU=0;
double CD=0;
double val1[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
//----
   SetIndexBuffer(0,val1);
   return(0);
  }
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- TODO: add your code here
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   if (CountBars>Bars) CountBars=Bars;
   SetIndexDrawBegin(0,Bars-CountBars);
//----
   int i;
   int    counted_bars=IndicatorCounted();
   //if(CountBars<=Lookback) return(0);
//---- initial zero
   //if(counted_bars<1)
   //{
   //   for(i=1;i<=Lookback;i++) val1[CountBars-i]=0.0;
   //}
   i=CountBars-1;
   while(i>=0)
     {
      L0A=L0;
      L1A=L1;
      L2A=L2;
      L3A=L3;
      L0=((1 - gamma)*iADX(NULL,timeperiods,periods,PRICE_HIGH,MODE_PLUSDI,i)) + gamma*L0A;
      L1=((- gamma *L0) + L0A) + (gamma *L1A);
      L2=((- gamma *L1) + L1A) + (gamma *L2A);
      L3=((- gamma *L2) + L2A) + (gamma *L3A);
//----
      CU=0;
      CD=0;
//----
      if (L0>=L1) CU=L0 - L1; else CD=L1 - L0;
      if (L1>=L2) CU=CU + L1 - L2; else CD=CD + L2 - L1;
      if (L2>=L3) CU=CU + L2 - L3; else CD=CD + L3 - L2;
      if (CU + CD!=0) LRSI=CU/(CU + CD);
      val1[i]=LRSI;
      i--;
     }
   return(0);
  }
//+------------------------------------------------------------------+