Which time zone are you in. I remember the futures market drop starting around 8 pm EST when the odds of Trump's win took a sudden climb.
How much of that was from panicky Asian and European traders? Once the American markets opened on the morning of the 9th the climb was well underway. I had hoped for a longer drop because I was ready to buy, buy, buy. But by the time I had a chance to, the crash was already done.
Eastern Time Zone. You are correct that the Dow futures were down substantially before midnight EDT. They were down about 700 points until Trump ran the table with Florida, Ohio, and North Carolina. When Pennsylvania was called from Trump, the futures began their turnaround, before the “blue wall” for Hillary! collapsed. By 2:30 am, when Fox and a few other networks began saying a Trump victory was likely, the futures were in a steep rise, turning dramatically positive.