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:    Plot Monthly,Weekly and Daily Moving average
				//  Author/Uploader: Anthony Faragasso 
				//  E-mail:          ajf1111@epix.net
				//  Date/Time Added: 2002-03-02 16:27:46
				//  Origin:          
				//  Keywords:        
				//  Level:           basic
				//  Flags:           indicator
				//  Formula URL:     http://www.amibroker.com/library/formula.php?id=168
				//  Details URL:     http://www.amibroker.com/library/detail.php?id=168
				//
				//------------------------------------------------------------------------------
				//
				//  You can plot a Monthly , weekly and Daily Moving average
				//
				//  on your Daily custom price chart window without changing the view
				//
				//  settings. Also, Title information is included.
				//
				//------------------------------------------------------------------------------
				
				//Plot Monthly, Weekly and Daily Moving Average on Daily Price Chart
				//Ver.1.01 revision
				//3/02/02, coded by Anthony Faragasso
				//e-mail: ajf1111@epix.net
				
				MaxGraph=7;
				
				//Input Time periods for Monthly,Weekly and Daily Moving Averages
				MonthlyPds=10;//Months
				WeeklyPds=20;//Weeks
				DailyPds=10;//Days 
				/***********************************/
				//Input Price Variable ( open, high ,low, close);
				Price=C;
				
				MonthlyPrice=Price;
				WeeklyPrice=Price;
				DailyPrice=Price;
				/**********************************/
				
				/***Colors***/
				//Set to your Preference
				Color=6;//Price chart
				MthAvgColor=3;//Monthly AverageLine
				WklyAvgColor=5;//weekly AverageLine
				DlyAvgColor=4;//Daily AverageLine
				/**********************************/
				
				Weekly=ValueWhen(DayOfWeek() > Ref( DayOfWeek(),1),WeeklyPrice);
				Monthly=ValueWhen(Day() > Ref( Day(), 1 ),MonthlyPrice);
				
				MonthlyAvg=EMA(Monthly,MonthlyPds);
				WeeklyAvg=EMA(Weekly,WeeklyPds);
				DailyAvg=EMA(DailyPrice,DailyPds);
				
				Graph0=C;
				Graph0Style=64;
				Graph0Color=Color;
				
				Graph1=WeeklyAvg;
				Graph1Style=1+4;//Thick line
				Graph1Color=WklyAvgColor;
				
				Graph2=DailyAvg;
				Graph2Style=1;
				Graph2Color=DlyAvgColor;
				
				Graph3=MonthlyAvg;
				Graph3Style=1;
				Graph3Color=MthAvgColor;
				
				
				Title=Name()+"  "+"("+WriteVal(WeeklyPds,1)+")"+" Week Moving Average= "+"("+WriteVal(WeeklyAvg,1.2)+")"+" :: "+"("+WriteVal(DailyPds,1)+")"+" Period Moving Average= "+"("+WriteVal(DailyAvg,1.2)+")"+" :: "+"("+WriteVal(MonthlyPds,1)+")"+" Month Moving Average= "+"("+WriteVal(MonthlyAvg,1.2)+")";