Subscribers to our monthly Option Advisor service doubled their money with our Robinhood Markets Inc (NASDAQ:HOOD) August 18 call recommendation, made on May 24. Below, we'll breakdown the reasons for our bullish recommendation, as well as what caused the spike in price. At the time, shares of the stock trading platform had just broke out above the $19 level, which is half its initial public offering (IPO) price and coincides with a 50% year-to-date gain. A retest of that level presented a good entry point ...