Trading just finished and most of the orders disapeared, Why?
Would you cancel your order a minute after closure of trading?
Usually I leave a order for the next day.
I suspect because of this event that the orders in the last few minutes and probably throughout the day were not by ordinary individuals but by brokerages working on their own behalf.

TimeBid Lots Bid Ask Ask Lots Last Trade Change Volume
16:12 5 1.99 2.00 7 1.98 0.05 498,267
16:02 5 1.99 2.00 7 1.98 0.05 498,267
16:01 5 1.99 2.00 7 1.98 0.05 498,267
15:59 369 1.98 2.00 7 1.98 0.05 498,267
15:56 401 1.98 2.00 20 1.98 0.05 490,567
15:52 68 1.99 2.01 21 2.01 0.08 477,367
15:23 598 1.98 1.99 180 1.99 0.06 431,067