Agree...The next chance to buy the dips might be around 5 bucks! I have committed the additional $100k, and will put in one third at each of 3 price points I've selected. I used this strategy on both the Trius and Celldex runs a while back and it paid off nicely.
Meanwhile, my initial investment (traded down over the years to about nothing) multiplies by infinity. You gotta love it.