If I were you I would analyze the stock very carefully before shorting. Be very very careful here. We did drop back below 4 but remember there was other things going on (DC issue). Almost all biotech stocks that gained recently were shorted but now that climate is almost cleared. So friend be very careful unless you are a very very big investor. There are many other biotechs around with too much speculative rises that are good candidates but I personally wouldn't short here particularly since we have presure upwards to atleast 4.4 in the near future. Just my 2 cents.
best - I read all such ridiculously over-the-top, neanderthal "short" statements above as a very bullish signal. Shorties will often post such nonsense to scare off retail and scoop up cheap shares. Look for good things to happen to CRIS in near future.