Alex Roy says investors need to pay attention to free cash flow and see if operating cash flow improvements reveal themselves in SpaceX (SPCX) earnings. The Elon Musk company releases its first earnings report as a publicly traded company after Tuesday's close. Aside from earnings, Alex says this company should be viewed as a telecommunications infrastructure play. He likes the vision of the company, but says a short-term hurdle to prepare for comes after earnings as the stock prepares to unlock shares following its IPO earlier in the year.