After a short correction last week, Nike (NKE) reversed course this week and charged upward, nearly reaching new, all-time highs. With such positive price action, what could be wrong? For one thing, on the monthly chart we can see that NKE is in a parabolic up move, and price is nearly vertical. Parabolics usually end in tears when price finally collapses, but, of course, there is no way of knowing exactly when that will happen.