In the 2008 book “Outliers: The Story of Success,” author Malcom Gladwell theorizes that it takes 10,000 hours of practice in order to become a master at a task. This applies to anything, whether it’s playing the piano, cooking, writing novels or even investing in the stock market. If you were to actively embark on this “10,000-Hour Rule,” you would need to carve out four hours of practice time, every day, for slightly less than seven years. That’s four hours each and every day, without breaks, for three-quarters of a decade. Want to become an expert at the stock...