The following stocks are ones to watch tomorrow based on quarterly earnings or trading ideas:Nvidia (NVDA) - the big report after the close tomorrow is the hot graphics chip stock. Nvidia struggled right at $120 again today. The valuation is stretched at 44x forward earnings and the stock could easily sell off on an earnings beat. My money wouldn't bet on the stock racing ahead after the report tomorrow. Twilio (TWLO) - as predicted, Twilio didn't move much on the big Q4 beat. The market didn't like the flat sequential guide and the valuation remains a big question mark. Still, the stock is trading more bullish as investors increasingly start looking at '18 revenue estimates that might eventually approach $500 million. More research: Twilio: Getting Interesting Whole Foods Market (WFM) - the organic food grocer shows the sector still remains under pressure. The stock trades in a tight range from $28 at the low to $34 at the higher over the last 18 months. The weak results should test the low tomorrow setting up a potential buy point with a tight stop. Imperva (IMPV) - the cybersecurity stock had an absolute blowout Q4. Analysts expected near break even numbers and Imperva earned $0.32 in the quarter. The stock probably isn't worth chasing at $47 in after hours though more research is needed on the subject. The real key takeaway is that FireEye (FEYE) remains a disaster based on the Imperva numbers. The sector continues to show that best of breed security products sell without needing to overspend on sales and marketing. 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: No position