Stocks to watch on Tuesday:Square (SQ) - the sell off continues with another 3.5% dip. The mobile payments provider isn't a buy until dipping to $30. Yext (YEXT) - another 5% dip to below $13 provides a solid entry point. CEO interview on Mad Money should provide a bump on Tuesday as the stock remains relatively unknown. Under Armour (UA, UAA) - with a 40% tax rate, Under Armour is one of the biggest beneficiaries of the tax cut. The effective tax rate was regularly above 32% prior to the restructuring charges in 2017. The stock has bounced solidly after dipping below $12 and offers good value with a market cap of only $5.8 billion and tax cuts going forward. Fitbit (FIT) - worth watching on this attempted break above strong resistance around $7. The stock has routinely crashed during the holidays, but the market has a tendency of reversing such trends. 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 daily blog posts from Out Fox The $treet. Disclosure: Long YEXT, UA