The shares of Citrix Systems (CTXS: sentiment, chart, options) have had a rough day. The stock was downgraded to "market perform" at Friedman, Billings, Ramsey. As a result, CTXS dropped 5.6% and reached its lowest level since late April. The one thing that concerned me about the stock is that it appears to be in danger of breaking out of its long-term uptrend. While the security's performance hasn't been fantastic, it has held above a long-term trendline connecting a series of higher lows in the shares since August 2002. A series of closes below this trendline could signal dark days for the equity as it breaks down.

There's still ample room for downgrades. Zacks reports that CTXS has earned 12 "buy" ratings, 9 "holds," and 1 "sell" rating. Any additional downgrades could spell trouble for the shares.