I actually made fun of that old saying here a little while back while anticipating a short entry during a dull market. For today, the data simply does not support it though.
With the benefit of using 4 months of hindsight, the psychologically easiest trade here at 2795 is to go short. Very hard to open a substantial long position here. One thing I've learned through the years.... the hardest trade to make psychologically almost always turns out to be the winning trade. Up we go. 2850 on the way.