During the normal trading day. Never bothered with the auctions tbh. I've done them through the etrade website and etrade pro (my trading platform). It really is broker dependent.
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
AN1 CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch