/*[[
	Name := t3_Moving_Volume
	Author := Copyright © 2004, David W Honeywell
	Link := DavidHon@msn.com
	Notes := Smoothed Moving Volume
	Separate Window := Yes
	First Color := Cyan
	First Draw Type := Line
	First Symbol := 217
	Use Second Data :=No
	Second Color := Red
	Second Draw Type := Line
	Second Symbol := 218
]]*/

Input    : t3_Period(17),VolType(0),b(0.618);

Variable : t3(0),MovVol(0),shift(0);
Variable : e1(0),e2(0),e3(0),e4(0),e5(0);
Variable : e6(0),c1(0),c2(0),c3(0),c4(0);
Variable : 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 then n=1;
n = 1 + 0.5*(n-1);
w1 = 2 / (n + 1);
w2 = 1 - w1;

SetLoopCount(0);
For shift = Bars-1 Downto 0 Begin
  SetIndexValue(shift, 0);
         
  MovVol=iCustom("t3_Moving_Volume_Support",MODE_FIRST,shift);

  e1 = w1*MovVol + 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 = c1*e6 + c2*e5 + c3*e4 + c4*e3;
 
  SetIndexValue(shift,t3);
  
End;