Or calling the bottom in July 2013 (paraphrasing a bit: buy everything below $60). Or calling various bull traps in 2014 (which I fell for myself, reliably, over and over again).
However, I give him most credit for a different type of prediction, about his own limitations. Early 2015 (someone else could look up the exact month), he essentially declared the bear market to be over, but added (paraphrasing, again): no targets this time, I cannot trade this anymore.
He's a competent trader, that much is plain visible if you check his post history. But he also seems to have a sense of distinguishing epistemic and aleatory uncertainty governing his trades. That's what makes him (in my opinion) a great trader.
/fanboyism
buying is easier, selling (at the right time) is hard.