But first, this is selling pressure (down volume / up volume):
I would also point out that today's leading market was the London FTSE, on news that the Brexit "article 50" invocation date has been settled (March 2017):
Which should complete wave 2 in our count:
Short-term S&P gaps:
2007-2008
2015-2016
One year of overnight risk ignored:
Gap risk compliments of Japanese Nikkei identical to 2008:
And German Dax:
Mind the Gap: