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LunarPhase.afl：源码内容

							//------------------------------------------------------------------------------
//
//  Formula Name:    LunarPhase
//  Author/Uploader: Marcelin Tudor 
//  E-mail:          marcelint@gmail.com
//  Date/Time Added: 2006-09-03 10:02:09
//  Origin:          
//  Keywords:        
//  Level:           basic
//  Flags:           exploration
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=682
//  Details URL:     http://www.amibroker.com/library/detail.php?id=682
//
//------------------------------------------------------------------------------
//
//  Plot Full Moon and New Moon on your chart. Simply and easy.
//
//------------------------------------------------------------------------------
// Input your local time zone
TZ=Param("Your local Time Zone? [-12 to +12hrs]",2, -12,12,1);
// Lunar cycle
LunarMonth=29.530589;
Offset=7.254621;
// Calendar }
leap=frac(Year( )/4)==0 AND frac(Year()/ 100)!=0 OR frac(Year()/ 400)==0;
y=Year()*365+ int(Year( )/4)-int( Year()/100) +int(Year( )/400);
m=
IIf(Month()==2,31-leap,
IIf(Month()==3,59,
IIf(Month()==4,90,
IIf(Month()==5,120,
IIf(Month()==6,151,
IIf(Month()==7,181,
IIf(Month()==8,212,
IIf(Month()==9,243,
IIf(Month()==10,273,
IIf(Month()==11,304,
IIf(Month()==12,334, -leap))))))) ))));
CurrentDay=y+ m+Day()-TZ/ 24-Offset;
// Full Moon }
FM=frac(CurrentDay/ LunarMonth) ;
FM=PeakBars( FM, 1, 1)==0;
// New Moon }
NM=frac((CurrentDay +LunarMonth/ 2)/LunarMonth) ;
NM=PeakBars( NM, 1,1)==0;
FullMoon=FM-NM==1;
NewMoon=FM-NM==-1;
//Plot Moon Phase in own window }
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));
Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 
SetChartBkGradientFill( ParamColor("BgTop", colorWhite),ParamColor("BgBottom", colorLightYellow));
shape = IIf(FullMoon,shapeCircle+shapePositionAbove,IIf(NewMoon,shapeCircle+shapePositionAbove,Null));
PlotShapes(shape,IIf(FullMoon,colorYellow,colorBlack),0,H);

						