I don't think it's hard. Just requires the right knowledge, emotional control, planning, and balance between impulses and patience.
Thing about block orders, is that, the larger they are, the more potentially profitable, but more cumbersome.
So while we put in our tiny little orders, like extremely maneuverable PT boats, the aircraft carrier that is SUNR has to deliberate on where it's going to go next.
I have a feeling that it's probably 20 mil shares or so, and, after enough clearance-- say 10 mil shares-- it'll crush all remaining bids. I've seen that over and over again.
Then the people like me, with our PT boats will swipe them at or very close to the absolute bottom. Buying at today's HOD might be buying at the high for the next 30 days. Not too bright, imo.