What the hell happened?!
I walk out for a couple of hours, and - this?!
Well, luckily, I sold at a loss at 940 and placed an optimistic buy at 902. Then I walked out. A few minutes later 902 got hit!
I have now 1 BTC more than what I started the day with.
On the down side, it seems to continue down, and I wonder if I should sell again and re-buy even lower...