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Price Persistency.afl：源码内容
							//------------------------------------------------------------------------------
//
//  Formula Name:    Price Persistency
//  Author/Uploader: Anthony Faragasso 
//  E-mail:          ajf1111@epix.net
//  Date/Time Added: 2002-12-29 18:20:39
//  Origin:          
//  Keywords:        
//  Level:           basic
//  Flags:           exploration
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=245
//  Details URL:     http://www.amibroker.com/library/detail.php?id=245
//
//------------------------------------------------------------------------------
//
//  Interested in measuring a short-term Trend ?
//
//  Price persistency is the number of days that a market continues to close
//  either up or down. It's another term for a market run. The usefulness of
//  Price Persistency is based on the theory of runs..It is the idea that,
//  given the market has moved in a particular direction for ( n ) days, the
//  likelihood it will either continue..or not...can be estimated and used in a
//  profitable trading system....
//
//------------------------------------------------------------------------------
//Price Persistency Exploration
//Interpreted from January,2002, TASC, page 44
//article by Gordon Gustafson on Price Persistency
//Coded by Anthony Faragasso, 12/31/01
//Version 1.00
/*****Bars in the test*****************/
bars=Cum(1);
/**************************************/
Day1up=C > Ref(C,-1);
Day1Dn=C < Ref(C,-1);
/**************************************/
Day2up=C > Ref(C,-1) AND Ref(C,-1) > Ref(C,-2);
Day2Dn=C < Ref(C,-1) AND Ref(C,-1) < Ref(C,-2);
/***********************************************/
Day3up=C > Ref(C,-1) AND Ref(C,-1) > Ref(C,-2) AND Ref(C,-2) > Ref(C,-3);
Day3Dn=C < Ref(C,-1) AND Ref(C,-1) < Ref(C,-2) AND Ref(C,-2) < Ref(C,-3);
/**********************************************/
Day4up=C > Ref(C,-1) AND Ref(C,-1)>Ref(C,-2)AND Ref(C,-2)>Ref(C,-3) AND Ref(C,-3) > Ref(C,-4);
Day4Dn=C < Ref(C,-1) AND Ref(C,-1)<Ref(C,-2)AND Ref(C,-2)<Ref(C,-3) AND Ref(C,-3) < Ref(C,-4);
/**********************************************/
Day5up=C > Ref(C,-1) AND Ref(C,-1)>Ref(C,-2)AND Ref(C,-2)>Ref(C,-3)AND Ref(C,-3) > Ref(C,-4) AND Ref(C,-4) > Ref(C,-5);
Day5Dn=C < Ref(C,-1) AND Ref(C,-1)<Ref(C,-2)AND Ref(C,-2)<Ref(C,-3)AND Ref(C,-3) < Ref(C,-4) AND Ref(C,-4) < Ref(C,-5);
/************************************************/
Day6up=C > Ref(C,-1) AND Ref(C,-1)> Ref(C,-2)AND Ref(C,-2)>Ref(C,-3)AND Ref(C,-3) > Ref(C,-4) AND Ref(C,-4) > Ref(C,-5) AND Ref(C,-5) > Ref(C,-6);
Day6Dn=C < Ref(C,-1) AND Ref(C,-1)< Ref(C,-2)AND Ref(C,-2)< Ref(C,-3)AND Ref(C,-3) < Ref(C,-4)AND Ref(C,-4) < Ref(C,-5) AND Ref(C,-5) < Ref(C,-6);
/***********************************************/
Day7up=C > Ref(C,-1) AND Ref(C,-1)> Ref(C,-2)AND Ref(C,-2)>Ref(C,-3)AND Ref(C,-3) > Ref(C,-4) AND Ref(C,-4) > Ref(C,-5)AND Ref(C,-5)>Ref(C,-6) AND Ref(C,-6) > Ref(C,-7);
Day7Dn=C < Ref(C,-1) AND Ref(C,-1)< Ref(C,-2)AND Ref(C,-2)< Ref(C,-3)AND Ref(C,-3) < Ref(C,-4)AND Ref(C,-4) < Ref(C,-5)AND Ref(C,-5)< Ref(C,-6)AND Ref(C,-6) < Ref(C,-7);
/*********************************************/
Day8up=C > Ref(C,-1) AND Ref(C,-1)> Ref(C,-2)AND Ref(C,-2)>Ref(C,-3)AND Ref(C,-3) > Ref(C,-4) AND Ref(C,-4) > Ref(C,-5)AND Ref(C,-5)>Ref(C,-6)AND Ref(C,-6) > Ref(C,-7) AND Ref(C,-7) > Ref(C,-8);
Day8Dn=C < Ref(C,-1) AND Ref(C,-1)< Ref(C,-2)AND Ref(C,-2)< Ref(C,-3)AND Ref(C,-3) < Ref(C,-4)AND Ref(C,-4) < Ref(C,-5)AND Ref(C,-5)< Ref(C,-6)AND Ref(C,-6) < Ref(C,-7)AND Ref(C,-7) < Ref(C,-8);
/**********************************************/
Day9up=C > Ref(C,-1) AND Ref(C,-1)> Ref(C,-2)AND Ref(C,-2)>Ref(C,-3)AND Ref(C,-3) > Ref(C,-4) AND Ref(C,-4) > Ref(C,-5)AND Ref(C,-5)>Ref(C,-6)AND Ref(C,-6) > Ref(C,-7)AND Ref(C,-7) > Ref(C,-8) AND Ref(C,-8) > Ref(C,-9);
Day9Dn=C < Ref(C,-1) AND Ref(C,-1)< Ref(C,-2)AND Ref(C,-2)< Ref(C,-3)AND Ref(C,-3) < Ref(C,-4)AND Ref(C,-4) < Ref(C,-5)AND Ref(C,-5)< Ref(C,-6)AND Ref(C,-6) < Ref(C,-7)AND Ref(C,-7) < Ref(C,-8) AND Ref(C,-8) < Ref(C,-9);
/**********************************************/
Day10up=C > Ref(C,-1) AND Ref(C,-1)> Ref(C,-2)AND Ref(C,-2)>Ref(C,-3)AND Ref(C,-3) > Ref(C,-4) AND Ref(C,-4) > Ref(C,-5)AND Ref(C,-5)>Ref(C,-6)AND Ref(C,-6) > Ref(C,-7)AND Ref(C,-7) > Ref(C,-8)AND Ref(C,-8)> Ref(C,-9) AND Ref(C,-9) > Ref(C,-10);
Day10Dn=C < Ref(C,-1) AND Ref(C,-1)< Ref(C,-2)AND Ref(C,-2)< Ref(C,-3)AND Ref(C,-3) < Ref(C,-4)AND Ref(C,-4) < Ref(C,-5)AND Ref(C,-5)< Ref(C,-6)AND Ref(C,-6) < Ref(C,-7)AND Ref(C,-7) < Ref(C,-8)AND Ref(C,-8) < Ref(C,-9) AND Ref(C,-9) < Ref(C,-10);
/************************************************/
tot1dayUp=LastValue(Cum(Day1up));tot1dayDn=LastValue(Cum(Day1Dn));
tot2dayUp=LastValue(Cum(Day2up));tot2dayDn=LastValue(Cum(Day2Dn));
tot3dayUp=LastValue(Cum(Day3up));tot3dayDn=LastValue(Cum(Day3Dn));
tot4dayUp=LastValue(Cum(Day4up));tot4dayDn=LastValue(Cum(Day4Dn));
tot5dayUp=LastValue(Cum(Day5up));tot5dayDn=LastValue(Cum(Day5Dn));
tot6dayUp=LastValue(Cum(Day6up));tot6dayDn=LastValue(Cum(Day6Dn));
tot7dayUp=LastValue(Cum(Day7up));tot7dayDn=LastValue(Cum(Day7Dn));
tot8dayUp=LastValue(Cum(Day8up));tot8dayDn=LastValue(Cum(Day8Dn));
tot9dayUp=LastValue(Cum(Day9up));tot9dayDn=LastValue(Cum(Day9Dn));
tot10dayUp=LastValue(Cum(Day10up));tot10dayDn=LastValue(Cum(Day10Dn));
/*********Percentages for Up or Down as a % of total bars *************/
totpct1dayup=tot1dayUp/(Cum(1))*100;
totpct1dayDn=tot1dayDn/(Cum(1))*100;
totpct2dayUp=tot2dayUp/(Cum(1))*100;
totpct2dayDn=tot2dayDn/(Cum(1))*100;
totpct3dayUp=tot3dayUp/(Cum(1))*100;
totpct3dayDn=tot3dayDn/(Cum(1))*100;
totpct4dayUp=tot4dayUp/(Cum(1))*100;
totpct4dayDn=tot4dayDn/(Cum(1))*100;
totpct5dayUp=tot5dayUp/(Cum(1))*100;
totpct5dayDn=tot5dayDn/(Cum(1))*100;
totpct6dayUp=tot6dayUp/(Cum(1))*100;
totpct6dayDn=tot6dayDn/(Cum(1))*100;
totpct7dayUp=tot7dayUp/(Cum(1))*100;
totpct7dayDn=tot7dayDn/(Cum(1))*100;
totpct8dayUp=tot8dayUp/(Cum(1))*100;
totpct8dayDn=tot8dayDn/(Cum(1))*100;
totpct9dayUp=tot9dayUp/(Cum(1))*100;
totpct9dayDn=tot9dayDn/(Cum(1))*100;
totpct10dayUp=tot10dayUp/(Cum(1))*100;
totpct10dayDn=tot10dayDn/(Cum(1))*100;
/*******************************************************/
/**********Percent up or down / previous up or down***********************/
Pct2dayUp=(tot2dayUp/tot1dayup)*100;
Pct2dayDn=(tot2dayDn/tot1dayDn)*100;
pct3dayUp=(tot3dayUp/tot2dayup)*100;
pct3dayDn=(tot3dayDn/tot2dayDn)*100;
pct4dayUp=(tot4dayUp/tot3dayUp)*100;
pct4dayDn=(tot4dayDn/tot3dayDn)*100;
pct5dayUp=(tot5dayUp/tot4dayUp)*100;
pct5dayDn=(tot5dayDn/tot4dayDn)*100;
pct6dayUp=(tot6dayUp/tot5dayUp)*100;
pct6dayDn=(tot6dayDn/tot5dayDn)*100;
pct7dayUp=(tot7dayUp/tot6dayUp)*100;
pct7dayDn=(tot7dayDn/tot6dayDn)*100;
pct8dayUp=(tot8dayUp/tot7dayUp)*100;
pct8dayDn=(tot8dayDn/tot7dayDn)*100;
pct9dayUp=(tot9dayUp/tot8dayUp)*100;
pct9dayDn=(tot9dayDn/tot8dayDn)*100;
pct10dayUp=(tot10dayUp/tot9dayUp)*100;
pct10dayDn=(tot10dayDn/tot9dayDn)*100;
Filter=1;
/***Current State of the Closes******/
stateUp=BarsSince(C < Ref(C,-1));
stateDown=BarsSince(C > Ref(C,-1));
AddColumn(stateUp,"currentUp");
AddColumn(statedown,"CurrentDown");
/***Close is equal to previous close*****/
AddColumn(Cum(C == Ref(C,-1)),"Close==PrevClose",1);
/***Days in a row ,whether up or down ( A Run )********/
//1 day
AddColumn(tot1dayUp,"1dayUp",1);AddColumn(tot1dayDn,"1dayDn",1);AddColumn(0,"%Up/PrevUp");AddColumn(0,"%Dn/PrevDn");AddColumn(totpct1dayUp,"%Up[bars]");AddColumn(totpct1dayDn,"%Dn[bars]");
//2 days 
AddColumn(tot2dayUp,"2dayUp",1);AddColumn(tot2dayDn,"2dayDn",1);AddColumn(pct2dayUp,"%Up/prevUp");AddColumn(pct2dayDn,"%Dn/prevDn");AddColumn(totpct2dayUp,"%Up[bars]");AddColumn(totpct2dayDn,"%Dn[bars]");
//3 days
AddColumn(tot3dayUp,"3dayUp",1);AddColumn(tot3dayDn,"3dayDn",1);AddColumn(pct3dayUp,"%Up/prevUp");AddColumn(pct3dayDn,"%Dn/prevDn");AddColumn(totpct3dayUp,"%Up[bars]");AddColumn(totpct3dayDn,"%Dn[bars]");
//4 days
AddColumn(tot4dayUp,"4dayUp",1);AddColumn(tot4dayDn,"4dayDn",1);AddColumn(pct4dayup,"%Up/prevUp");AddColumn(pct4dayDn,"%Dn/prevDn");AddColumn(totpct4dayUp,"%Up[bars]");AddColumn(totpct4dayDn,"%Dn[bars]");
//5 days
AddColumn(tot5dayUp,"5dayUp",1);AddColumn(tot5dayDn,"5dayDn",1);AddColumn(pct5dayup,"%Up/prevUp");AddColumn(pct5dayDn,"%Dn/prevDn");AddColumn(totpct5dayUp,"%Up[bars]");AddColumn(totpct5dayDn,"%Dn[bars]");
//6 days
AddColumn(tot6dayUp,"6dayUp",1);AddColumn(tot6dayDn,"6dayDn",1);AddColumn(pct6dayUp,"%Up/prevUp");AddColumn(pct6dayDn,"%Dn/prevDn");AddColumn(totpct6dayUp,"%Up[bars]");AddColumn(totpct6dayDn,"%Dn[bars]");
//7 days
AddColumn(tot7dayUp,"7dayUp",1);AddColumn(tot7dayDn,"7dayDn",1);AddColumn(pct7dayUp,"%Up/prevUp");AddColumn(pct7dayDn,"%Dn/prevDn");AddColumn(totpct7dayUp,"%Up[bars]");AddColumn(totpct7dayDn,"%Dn[bars]");
//8 days
AddColumn(tot8dayUp,"8dayUp",1);AddColumn(tot8dayDn,"8dayDn",1);AddColumn(pct8dayUp,"%Up/prevUp");AddColumn(pct8dayDn,"%Dn/PrevDn");AddColumn(totpct8dayUp,"%Up[bars]");AddColumn(totpct8dayDn,"%Dn[bars]");
//9 days
AddColumn(tot9dayUp,"9dayUp",1);AddColumn(tot9dayDn,"9dayDn",1);AddColumn(pct9dayUp,"%Up/prevUp");AddColumn(pct9dayDn,"%Dn/prevDn");AddColumn(totpct9dayUp,"%Up[bars]");AddColumn(totpct9dayDn,"%Dn[bars]");
//10 days
AddColumn(tot10dayUp,"10dayUp",1);AddColumn(tot10dayDn,"10dayDn",1);AddColumn(pct10dayUp,"%Up/prevUp");AddColumn(pct10dayDn,"%Dn/prevDn");AddColumn(totpct10dayUp,"%Up[bars]");AddColumn(totpct10dayDn,"%Dn[bars]");
AddColumn(bars,"bars",1);

						