In my opinion, if anyone try to grab these 900k shares, the 900k...

In my opinion, if anyone try to grab these 900k shares, the 900k order would withdraw first before the buyer actually can hit it.

This is the advantage from these big instos. They have (they paid) the direct link access to the asx console which can get the stock movement in millisecond and then setup some events when certain things happened. i.e. withdraw the sell order.

As mak said, if someone really wants to sell a big parcel. They would hire a broker to distribute them not this way.

This is my understanding and DYOR