Here are the trades executed in NF today between 10:20:31 and 10:20:32 this morning.
It started at 5908 and ended at 5990 and all happened in that one second.
Notice the bid- ask spread at 10:20 :32 between 5945 – 5990 which was the reason we got that high tick.
Buyers and sellers match and a trade is done in this case at very high volumes.
The total volume from the 5908 tick measure 949450 shared in NF and those at 10:20:32 was 824050 in volume.