$2 level seems like a comfort zone, the rest on that level combined with the lower volumes suggest it might found a new base.
-Strong insider sentiment
-Double bottom + channel breakout
-DMI indicating the breakout is strong enough to climb up
-Multiple MA's looking positive
-Crossed above the $4.5 level with high volume
-Positive ADX outlook (new positive trend)
-very positive money flow, seems like a swing play with a limited risk.
ALXN is under heavy pressure, seems like a solid short play while it seems sellers are more aggressive then before
Failed to hold support levels, heavy volume on down-days- seems like it's going to test the $22-$21 level before deciding what's next.
-Weak technicals, short float is rising fast and valuation is extremely overvalued even for the long run.