Up to the minute news related to short term swings

Does anyone have a news source/site that provides immediate information on dramatic moves in the index futures?

Back when I had a direct line to a desk on the S&P floor, I could get immediate info on what drove a big move. But in this day of instantaneous news, I haven't found a similarly rapid response source.

Today is a prime example of "WTF just happened?"

Any help would be appreciated.
Today at 11:44 EST is prime example. 13 point swing in the S&P in less than a minute.

I'd love to have a website or subscription that provided timely info.

C'est la vie.