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Weekly chart.afl：源码内容

							//------------------------------------------------------------------------------
//
//  Formula Name:    Weekly chart
//  Author/Uploader: Graham Kavanagh 
//  E-mail:          gkavanag@bigpond.net.au
//  Date/Time Added: 2003-01-01 22:46:10
//  Origin:          
//  Keywords:        weekly
//  Level:           medium
//  Flags:           indicator
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=248
//  Details URL:     http://www.amibroker.com/library/detail.php?id=248
//
//------------------------------------------------------------------------------
//
//  Weekly chart to be shown in indicator window. This is for fixed weeks
//  Monday to Friday.
//
//------------------------------------------------------------------------------
firstday = ValueWhen( Cum(1)==1, DayOfWeek() );
numweeks = IIf(LastValue(DayOfWeek())==firstday, LastValue(Cum(DayOfWeek()==firstday)),LastValue(Cum(DayOfWeek()==firstday))+1 );
numweek = IIf(firstday==1, Cum( DayOfWeek() < Ref(DayOfWeek(),-1) ), IIf(firstday>1, Cum( DayOfWeek() < Ref(DayOfWeek(),-1) )+1 , 0 ));
numweek = IIf(IsEmpty(numweek),1,numweek);
firstbar = LastValue(Cum(1))-LastValue(numweek)+1;
dayRef =  5-LastValue(DayOfWeek()) + 4*( Cum(1) - LastValue(Cum(1)) );
xxx =  Min(0,5-LastValue(DayOfWeek()) + 4*( Cum(1) - LastValue(Cum(1)) ));
wo = IIf(IsEmpty( Ref(DayOfWeek(),-DayOfWeek()) ), ValueWhen(DayOfWeek()==firstday,O), ValueWhen(DayOfWeek()==1,O ) );
wh = HHV(H,Min(DayOfWeek(),5));
wl = LLV(L,Min(DayOfWeek(),5));
wc = C;
weeko =Ref(wo,xxx);
weekh = Ref(wh,xxx);
weekl = Ref(wl,xxx);
weekc = Ref(wc,xxx);
PlotOHLC(weeko,weekh,weekl,weekc,"weekly",colorBlack,styleCandle);
Filter=1;
AddColumn(DayOfWeek(),"day",1.0);
AddColumn(O,"oooo",1.1);
AddColumn(H,"hhhh",1.1);
AddColumn(L,"llll",1.1);
AddColumn(C,"cccc",1.1);
AddColumn(wo,"wo",1.1);
AddColumn(wh,"wh",1.1);
AddColumn(wl,"wl",1.1);
AddColumn(wc,"wc",1.1);
AddColumn(weeko,"wko",1.1);
AddColumn(weekh,"wkh",1.1);
AddColumn(weekl,"wkl",1.1);
AddColumn(weekc,"wkc",1.1);
AddColumn(firstbar ,"fstb",1.0);
AddColumn(numweek ,"nwk",1.0);
AddColumn(Cum(1),"cum1",1.0);
AddColumn(xxx,"xxx",1.0);
AddColumn(Ref(DateNum(),xxx),"refdate",1.0);

						