I haven't checked his/her other posts against technical analysis, but this one checks out. There is a well defined rising wedge, here, and strong long-term resistance sitting at 8.13. If it were to break, his target is valid. The market puked during after hours, probably giving him confidence that the wedge would break downward.
Now, the futures have dumped due to bad news out of Europe and a weak China PMI.
That is how smarter trolls like to roll. Their observations may have decent backing, but any reasoning they give is laughable. It is for the LULZ.