Stocks to watch on Tuesday:Synergy Pharma (SGYP) - replacing a long-time CFO right after the launch of a new FDA approved drug is never a good sign. The CFO is 69 years old, but retirement at this stage will hang over the stock. Synergy Pharma wouldn't have lost half its value and the CFO would no doubt hang around for the joys of a successful launch of Trulance. The implications are troubling. Snap (SNAP) - the market held the social network stock to a meager 1% loss on news that Instagram Stories has officially stolen the growth potential. SNAP shouldn't trade anywhere near a market value of $30 billion with the stock around $20 based on Facebook (FB) so easily copying product features. The stock isn't worth anymore than $10. United Airlines (UAL) - the airline shock off any negativity from the passenger removal scandal. The airline forecast a Q2 return to PRASM growth of possibly up to 3% showing that most of the flying public doesn't blame United Airlines for the debacle and definitely aren't willing to pay higher fares on another airline to prove a point. Rapid7 (RPD) - the cybersecurity stock appears set for a breakout and run towards previous highs at $19, if not much higher. After pre-announcing positive results while trading at a reasonable valuation, Rapid7 has built towards this breakout. The stock is amazingly underfollowed with only 683 people watching the ticker on StockTwits. Click on the Sign in/Sign up button in the top right corner to join for free to comment on your stock moves for tomorrow.Click on the Follow button to get the daily blog posts from Out Fox The $treet.Disclosure: Long UAL