Trader Brian Jones on Twitter: "Now in hindsight I would have been better off taking all my gain on the rally from 138 down to only 87 down then buy back in at 3770 long again. But I didn't expect such a drop so fast like that." / Twitter

Now in hindsight I would have been better off taking all my gain on the rally from 138 down to only 87 down then buy back in at 3770 long again. But I didn't expect such a drop so fast like that.