YIKES! I just saw that MAX PAIN is $55 for TWTR . . . that's a long way to fall (and options guys are mostly right).
I can see the air seeping out of the TWTR balloon. If TWTR closes in the red (or nearly so, having been UP 4+% today on high volume) it will GAP DOWN tomorrow; and we will have seen, today, it's high for the year.
In general, the underpinnings of this market are getting weaker by the minute today. Not a good sign for longs anywhere - especially FB and TWTR. Don't count on the notion that traders will hold big profits until next year. It does not usually happen when the market is up this much in 12 months (it's the "I better find a chair before the music stops" theory of trading).