//+------------------------------------------------------------------+
//|                                            i-RoundPrice-T01m.mq4 |
//|          25.07.2006  Translated on MT4 by Ким Игорь В. aka KimIV |
//|                                              http://www.kimiv.ru |
//+------------------------------------------------------------------+
/*[[
	Name := RoundPrice
	Author := Copyright © 2006, HomeSoft Tartan Corp.
	Link := spiky@transkeino.ru
	Separate Window := No
	First Color := Lime
	First Draw Type := Line
	First Symbol := 217
	Use Second Data := Yes
	Second Color := Red
	Second Draw Type := Line
	Second Symbol := 218
]]*/
#property copyright "Copyright © 2006, HomeSoft Tartan Corp."
#property link      "spiky@transkeino.ru"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Aqua
#property indicator_color2 Red

//------- Внешние параметры индикатора -------------------------------
extern int t3_period=21;
extern double b=0.7;

extern int Price4ma =  0;
extern int Len      = 39;
extern double Cycle =  4;
extern int Phase    =  2;
extern double Level =  0.3;
extern double Coeff =  7;

extern int mBar=300;

//------- Глобальные переменные индикатора ---------------------------
double dBuf0[], dBuf1[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
void init() {
  SetIndexBuffer    (0, dBuf0);
  SetIndexEmptyValue(0, EMPTY_VALUE);
  SetIndexStyle     (0, DRAW_LINE,EMPTY,2);

  SetIndexBuffer    (1, dBuf1);
  SetIndexEmptyValue(1, EMPTY_VALUE);
  SetIndexStyle     (1, DRAW_LINE,EMPTY,2);
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
void start() {
  bool   ft=True;
  double e1, e2, e3, e4, e5, e6, c1, c2, c3, c4, n, w1, w2, b2, b3;
  double t3[];
  double MAB[];
  int    LoopBegin, shift;

  int    i,limit, num;
  double alfa, beta, t, AvgRange,Weight, step,step1,g;
  double pi = 3.1415926535;    
  
  limit=mBar; 
  
  LoopBegin=mBar;

  ArrayResize(t3,mBar);
  ArrayResize(MAB,mBar);
  step = 2.0*Cycle/(Len-1);
  num = MathRound((Len-1)/(2.0*Cycle))+Phase;
     
  for(shift=limit;shift>=0;shift--) 
  {	
   Weight=0;AvgRange=0;
   
     for (i=0;i<=Len-1;i++)
	   { 
         if ( i <= num )
         step = 1.0/num;  
         else
         step = (2.0*Cycle-1)/(Len-1-num);
      
      t = i*step;
      g = 1.0/(Coeff*t+1);   
      if (g > Level ) g = 1;
      beta = MathSin(pi*(t + 0.5));
      alfa = g * beta;
      AvgRange = AvgRange + alfa*iMA(NULL,0,1,0,MODE_SMA,Price4ma,shift+i);
      Weight =Weight + alfa;
      
      }
	
   if (Weight > 0) MAB[shift]=AvgRange/Weight;
  }
	
  if (ft) {
    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;
    ft=False;
  }

  for (shift=LoopBegin; shift>=0; shift--) {
    e1=w1*MAB[shift]+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;

    t3[shift]=c1*e6+c2*e5+c3*e4+c4*e3;
    Comment ("MAB=",MAB[shift]," t3=",t3[shift]);
    if (t3[shift+1]<=t3[shift]) dBuf0[shift]=t3[shift]; else dBuf0[shift]=0;
    if (t3[shift+1]>t3[shift]) dBuf1[shift]=t3[shift]; else dBuf1[shift]=0;
  }
}
//+------------------------------------------------------------------+

