Its a broker report, which shows all the buys and sells by...

Its a broker report, which shows all the buys and sells by different brokers, as well as the average price of those transactions from 21-28 October. You can distinguish the retail brokers (CMC, Commsec, Etrade etc) from the brokers that s708 sophisticated investors typically use (Hartleys, Morgans etc) from those that cater exclusively to large institutional clients (Morgan Stanley, Credit Suisse, UBS etc), to see where the volume has been coming from.

Short term traders use it as a tool to see if there has been institutional accumulation (net buying by institutional investors), or institutional distribution (net selling by instos to less sophiscated retail investors) to gauge the level of aggregate demand over the short term. It's most useful for microcaps over a short trading period. In this stock I won't say its very useful, other than to show that institutional investors are very active but have not demonstrated any strong net long or short perspective, at least for last week.