930ET (US Open) and US equity futures plunge...
1130ET (EU Close) and US equity futures surge...
Update: Seems the intraday pattern is fully embedded in the machines' code. The European close (1130ET) triggered a wave of algo buying to erase the ignorant selling at the US Open (which did not take place due to the holiday)...
http://www.zerohedge.com/news/2019-01-21/someone-forgot-tell-machines-market-closed

Realist - Everybody in America is soft, and hates conflict. The cure for this, both in politics and social life, is the same -- hardihood. Give them raw truth.