Live Intraday Trading - Trading against the trend

At current situation there is heavy buying going on in Pharma sector . But , I choose to short the stock , WHY?
The stock was rejecting from the high's and at the same time it was trading near it's whole number . This two indications made me to short the stock against the trend.

Note : DO NOT TRADE AGAINST THE TREND UNTIL YOU ARE A EXPERIANCED TRADER.

THANK YOU !!!