First up is Cornerstone OnDemand ( CSOD), a $2.57 billion software stock that's been on a tear in 2013. Since the first trading session of the year, CSOD has rallied more than 69%. But the upside could be over thanks to a bearish setup that's been forming in shares. >>5 Hated Earnings Stocks You Should Love CSOD is currently forming a descending triangle pattern, a bearish setup that's formed by a horizontal support level below shares at $46 and downtrending resistance to the upside. Basically, as CSOD bounces in between those two technical price levels, it's getting squeezed closer and closer to a breakdown below $46. When that happens, we've got a sell signal. $46 gets some extra strength as a support level because it acted as resistance for shares on the way up back in the summer. The fact that buyers assigned some extra significance to $46 makes it a level that's worth watching on the way down. The 50-day moving average has been a good proxy for resistance on the way down. If you decide to bet against CSOD from here, that's where you'll want to keep a protective stop.