After stock bounced from resistance that is intact since May 2013 and broke down upper level support @ $76 with strong follow through to November lows.
Now, it is flagging near lows in front of support. With weak Biotechnology sector and market sitting on resistance it could be start of another down leg.
Enter short @ $63.80 Stop above 21 MA @ $66.83 Target $58.07-$59.76 and then I expect potential break down and continuation move to low 50ish area.