It basically indicates who has done all the buying and selling,...

It basically indicates who has done all the buying and selling, this is handy to tell if a certain broker for instance has been selling out after a CR and it can also show who’s bullish on the stock by telling us their buy/sell volume, ComSec at the top of the broker data tells us retail (mums n dads) have been buying and selling the most by the looks of it and as someone just indicated (Pershing) who must trade for CPS have been unloading recently since the last CR which to me is good news as those shares have fallen into fresh hands at a higher SP than where it sits rightnow