Tuesday, April 28th is another busy day on Wall Street. We outline notable earnings and the key economic data to keep an eye on. TheStreet's Jim Cramer says the one report he's watching on Tuesday is Twitter's (TWTR) first quarter financial results. Goldman Sachs analysts think Twitter will have a strong quarter. Other earnings include GoPro (GPRO), Merck & Co (MRK), Pfizer (PFE), Ford Motor Co (F), JetBlue (JBLU), and United Parcel Service (UPS). On the economic calendar, we look out for the home price index as well as consumer confidence data. TheStreet's Kurumi Fukushima reports in New York.