I think that the wave 4 correction ended at yesterday's lows. Today's action started off looking like it could be the B up, and it still could, but it also looks like we'll gap up to another new high tomorrow, which makes me think this is wave 5.
One new high on a B up is not too uncommon, but two would be a little out of the ordinary in my understanding.
Plus, Wednesday's downdraft was a 50% retrace of the move from 1333 to 1375, at the 1354 low, which is a perfect ABC-type retrace level.
If we look at the move from 1333 to 1375 as iii, then v should be less than 42 points from the 1354 low.