Swing Trade - AMGN

Of the 20 odd stocks I track on my Web Trader, AMGN was the weakest. It broke support right out of the gate and was struggling for a retest. I decided to short as the 10 period EMA came swooning down. I set my stop 10 cents above the support break. I covered 50% after a 1 pt. gain and I'm swinging the balance with a stop at $66.10.