ARNA is trading technically very well. From the April lows to the June highs the chart made a 50% retracemtent continued higher then had a double bottom reversal on July 13 and 14 of 3.82 . From this low to the July 31 high of 5.23, it retraced again exactly to 4.35 a 62% retracement on August 12. This low could be a good sell stop level for short term trades. If the longer uptrend started in April continues, ARNA could go to 9.81.