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:    McClellan Oscillator
				//  Author/Uploader: Tomasz Janeczko 
				//  E-mail:          tj@amibroker.com
				//  Date/Time Added: 2001-06-16 08:26:59
				//  Origin:          Originally developed Sherman and Marian McClellan
				//  Keywords:        breadth,overbought,oversold
				//  Level:           basic
				//  Flags:           indicator
				//  Formula URL:     http://www.amibroker.com/library/formula.php?id=12
				//  Details URL:     http://www.amibroker.com/library/detail.php?id=12
				//
				//------------------------------------------------------------------------------
				//
				//  The McClellan Oscillator, developed by Sherman and Marian McClellan, is a
				//  market breadth indicator that is based on the smoothed difference between
				//  the number of advancing and declining issues on the New York Stock
				//  Exchange. The McClellan Oscillator is one of the most popular breadth
				//  indicators. Buy signals are typically generated when the McClellan
				//  Oscillator falls into the oversold area of -70 to -100 and turns up. Sell
				//  signals are generated when the oscillator rises into the overbought area of
				//  +70 to +100 and then turns down. Extensive coverage of the McClellan
				//  Oscillator is provided in their book "Patterns for Profit" .
				//
				//------------------------------------------------------------------------------
				
				/*
				McClellan Oscillator
				*/
				
				Graph0 = Ema( AdvIssues()-DecIssues(), 19 ) - Ema( AdvIssues()-DecIssues(), 39 );