strength and weakness.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:    Strength and Weakness
//  Author/Uploader: Eric Paradis 
//  E-mail:          
//  Date/Time Added: 2006-02-14 00:57:08
//  Origin:          Created From Ed Seykota's Trading Tribe Website
//  Keywords:        
//  Level:           basic
//  Flags:           exploration
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=587
//  Details URL:     http://www.amibroker.com/library/detail.php?id=587
//
//------------------------------------------------------------------------------
//
//  Measures the strength in a stock over a 20 day period, generates a 20-day
//  rate of change and a yearly rate of change.
//
//------------------------------------------------------------------------------

//Coded by Eric Paradis 2006. 
//Computes Strength and Weakness of stocks over a 20-day period.



Lag= Ref(Close,-21);
Lag =  Lag + (Ref(Close,-20)-Lag)/20;
Lag =  Lag + (Ref(Close,-19)-Lag)/20;
Lag =  Lag + (Ref(Close,-18)-Lag)/20;
Lag =  Lag + (Ref(Close,-17)-Lag)/20;
Lag =  Lag + (Ref(Close,-16)-Lag)/20;
Lag =  Lag + (Ref(Close,-15)-Lag)/20;
Lag =  Lag + (Ref(Close,-14)-Lag)/20;
Lag =  Lag + (Ref(Close,-13)-Lag)/20;
Lag =  Lag + (Ref(Close,-12)-Lag)/20;
Lag =  Lag + (Ref(Close,-11)-Lag)/20;
Lag =  Lag + (Ref(Close,-10)-Lag)/20;
Lag =  Lag + (Ref(Close,-9)-Lag)/20;
Lag =  Lag + (Ref(Close,-8)-Lag)/20;
Lag =  Lag + (Ref(Close,-7)-Lag)/20;
Lag =  Lag + (Ref(Close,-6)-Lag)/20;
Lag =  Lag + (Ref(Close,-5)-Lag)/20;
Lag =  Lag + (Ref(Close,-4)-Lag)/20;
Lag =  Lag + (Ref(Close,-3)-Lag)/20;
Lag =  Lag + (Ref(Close,-2)-Lag)/20;
Lag =  Lag + (Ref(Close,-1)-Lag)/20;
AV = Lag;

pctROC = (Close-AV)/AV;
//365.25 / 20 * (P-AV20)/AV20
YROC = (Close-AV)/AV*100/20 * 365.25; 



Y = Volume> 200000;
Filter = Y AND Close > 5.00;// AND Retrace;
AddColumn(pctROC, "(P-AV)/AV", 1.2 ); 
AddColumn(YROC, "Yearly % ROC Filter", 1.2 );