Twitter and Buffalo Wild Wings have one thing in common: a rising stock price in the wake of Wall Street’s low expectations. David Kretzmann analyzes their latest results, along with the perplexing case of iRobot.  Plus, we dip into the Fool Mailbag and wrap up Halloween Candy Week. Thanks to Freshbooks for supporting The Motley Fool.  Get a 30-day free trial by going to FreshBooks.com /FOOL and enter “MOTLEY FOOL” in the “How Did You Hear About Us?” section.