Stocks have been extremely strong, with the market having seen impressive results over the past eight years since the financial crisis. Yet some individual stocks have crushed the overall market with outrageous gains. Weight Watchers International (NYSE: WTW), Esperion Therapeutics (NASDAQ: ESPR), and Health Insurance Innovations (NASDAQ: HIIQ) have all managed to quadruple or more in just 12 months. Investors who’ve seen these stocks for the first time recently want to know if they can score any further gains from these companies.