I used to have the ideas that the lunch time will have small and quiet price movement. But this Tuesday and Wednesday, the move started at lunch hour (12:00) with significant volume as well. So you might want to take note of recent market behavior.
Today is the expiration day, expiration pinning is going to be in action. By looking back at past 1-2 month movement, look like if there is a move, it is starting from lunch hour as well. So if you are looking at which direction and what whole number (it could be the non-existence of 3/4 whole number as well) to focus on, look at the price movement from 12:00 onward.
I will be looking GOOG, AAPL, OIH, GS and SHLD.
Just to share.