Subscribers to Schaeffer's Players service more than doubled their money with our recommendation to buy Fidelity National Information Services Inc (NYSE:FIS) weekly 9/20 78-strike call. Below, let's unpack how investors achieved this healthy profit in just three weeks.At the time of our recommendation on Aug. 23, FIS was in the midst of a post-earnings pop following the company's Aug. 6 results. The equity had just hit a new all-time high, and was pulling back to support at its 10-day moving average after b ...