First one is who's buying. Date: 25/02-12/03. Vol='000. Second one is who's selling.
UBS wholesale and Merrill Lynch are the main buyers.
Main sellers are Commsec (retail), AIEX (which Westpac Online Investing brand), and SOSL (State One Stockbroking, which is a small broker).
Big guys are buyers, small guys are sellers.
Refer to table for broker names as doesnt fit in chart legend.