GT::Indicators::ADL - Accumulation/Distribution line
The Accumulation/Distribution Line was developed by Marc Chaikin to assess the cumulative flow of money into and out of a security.
The ADL is the cumulative sum of (((Close - Low) - (High - Close)) / (High - Low)) * Volume
http://www.stockcharts.com/education/What/IndicatorAnalysis/indic_AccumDistLine.html http://www.equis.com/free/taaz/accumdistr.html