I think that the larger sells are mostly coming from one or more...

I think that the larger sells are mostly coming from one or more of the broker nominees ,my bet is it is mainly Comsec nominees ,they have a history of being in and out of the top 20 and dumping and buying back ,the rest of the volume is people needing cash along with the sheep that react to the larger dumps.
I think a lot of the buys are broken up into smaller buys then dumped in a larger parcel to try and spook investors.
I have been watching these nominees brokers for years over many stocks and they are sharks who destroy share prices ,trading these stocks.
Comsec nominees was wiped out trying to trade this stock last time the share price spiked to 18 cents ,the share price has never gone below there dumped sell price under 6 cents ,so they would be pissed trying everything they can to get that holding back in my opinion.
Overall IM not sure Comsec nominees would have the stock to play around ,so it could be one of the other active brokers playing this stock who's holdings have changed quite often in and out of the top 20 over the past few years.