I trade YM all the time, including that period. Comments ... hmmm ... it often seems like you see the high or low of the day, on a non-trending day, around 1-2 PM EST. So, if it's a non-trending day, there's money to be made on the reversal. The probabilities then are at their highest in the day, IMO. And depending on what kind of day it is, you can get some rapid movement into the close.