RE: Blue Close20 Jan 2020 20:12
Not clear who the idiot is?
If this is a hidden order it will be broken up into smaller sizes to ease trading and ensure the best prices are achieved.
These trades happen at different times during the day, the time stamp of which will be the concluding trade.
So it is quite feasible for a hidden trade to be made in the morning, affect trading during the day and then receive the time stamp of the final fulfilling trade in extended hours. As appears to be the case here.