IMO what people will want to see as a signal it is due to go higher is a few things...
Announcement of price increase. Haven't seen one so unlikely for 2015 and doubtful one would come mid year.
Early release of sub numbers that beat street estimates (not company guidance, we know they guide low).
Debt offering to fund additional buybacks... though they have handled half of this with cash and they could continue to do so.
Stronger guidance / guidance that appears less conservative relative to last year.
Like I said the investor in me wants to see it drag slowly through 2015 up to the $4 mark. But hell, running to $5.50 and pulling a near triple and flipping out of the options... I wouldn't be "unhappy" with that either but I'd no longer be invested