t3 function.afl

一个更精度的平滑涵数, 可用于股票交易系统.用于Amibroker 平台

//------------------------------------------------------------------------------
//
//  Formula Name:    T3 Function
//  Author/Uploader: Jayson Casavant 
//  E-mail:          [e-mail]
//  Date/Time Added: 2004-03-03 20:07:15
//  Origin:          Tim Tillson is a software project manager at Hewlett-Packard, with degrees in Mathematics and Computer Science. He has privately traded options and equities for 15 years.
//  Keywords:        Moving Average
//  Level:           semi-advanced
//  Flags:           showemail,function
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=342
//  Details URL:     http://www.amibroker.com/library/detail.php?id=342
//
//------------------------------------------------------------------------------
//
//  In filter theory parlance, T3 is a six-pole non-linear Kalman filter.
//  Kalman filters are ones which use the error (in this case (time series -
//  EMA(n)) to correct themselves. In Technical Analysis, these are called
//  Adaptive Moving Averages; they track the time series more aggressively when
//  it is making large moves.
//
//  If you enjoy reading tech material there is a white paper posted at...
//
//  http://groups.yahoo.com/group/amibroker-ts/files/
//
//  I did not create the code, I only adapted it to function form. To call the
//  T3 function use the syntax T3(price,periods) as in T3(C,50) . You can also
//  substitute any indicator for price as in T3(RSI(14),20)
//
//------------------------------------------------------------------------------


function T3(price,periods)


{
s = 0.84;
e1=EMA(price,periods);
e2=EMA(e1,Periods);
e3=EMA(e2,Periods);
e4=EMA(e3,Periods);
e5=EMA(e4,Periods);
e6=EMA(e5,Periods);
c1=-s*s*s;
c2=3*s*s+3*s*s*s;
c3=-6*s*s-3*s-3*s*s*s;
c4=1+3*s+s*s*s+3*s*s;
Ti3=c1*e6+c2*e5+c3*e4+c4*e3;
return ti3;
}
Plot(C,"",4,64);
Plot(T3(C,50),"T3",colorYellow,1);
Plot(t3(C,20),"T3",colorBlue,1);