It shows number of buyers and sellers at each price point.
Regards.............
Code Exch R Last +/- % Bid Ask Volume Open High Low Basis PrevClose VWAP MktValue MktVol Value BidVol AskVol Status Tr Time Tr Date Short Desc Trend SPC Match Price Surplus Vol OI Update Time Update Date Ex Date Ex Price Settlement Price Notes Match Volume DS PRE ASX 0.5 0 0 0.4 0.5 0 0 0 0 0.5 0 0 0 0 3,940,000 12,867,744 C 16:10:22 05-Apr-2012 Pacrim Energy 16:10:22 05-Apr-2012 0 0 0 0 19:00:00 05-Apr-2012 0 0 0 TM