Taking full advantage of the stock market and investing with confidence are common goals for new and old investors, and Zacks Premium offers many different ways to do both.The research service features daily updates of the Zacks Rank and Zacks Industry Rank, full access to the Zacks #1 Rank List, Equity Research reports, and Premium stock screens, all of which will help you become a smarter, more confident investor.Zacks Premium includes access to the Zacks Style Scores as well.What are the Zacks Style Scores?Developed alongside the Zacks Rank, the Zacks Style Scores are a group of complementary indicators that help investors pick stocks with the best chances of beating the market over the next 30 days.Each stock is given an alphabetic rating of A, B, C, D or F based on their value, growth, and momentum qualities. With this system, an A is better than a B, a B is better than a C, and so on, meaning the better the score, the better chance the stock will outperform.The Style Scores are broken down into four categories:Value ScoreFinding good stocks at good prices, and discovering which companies are trading under their true value, are what value investors like to focus on. So, the Value Style Score takes into account ratios like P/E, PEG, Price/Sales, Price/Cash Flow, and a host of other multiples to highlight the most attractive and discounted stocks.Growth ScoreGrowth investors are more concerned with a stock's future prospects, and the overall financial health and strength of a company. Thus, the Growth Style Score analyzes characteristics like projected and historic earnings, sales, and cash flow to find stocks that will see sustainable growth over time.Momentum ScoreMomentum trading is all about taking advantage of upward or downward trends in a stock's price or earnings outlook, and these investors live by the saying "the trend is your friend." The Momentum Style Score can pinpoint good times to build a position in a stock, using factors like one-week price change and the monthly percentage change in earnings estimates.VGM ScoreIf you like to use all three kinds of investing, then the VGM Score is for you. It's a combination of all Style Scores, and is an important indicator to use with the Zacks Rank. The VGM Score rates each stock on their shared weighted styles, narrowing down the companies with the most attractive value, best growth forecast, and most promising momentum.How Style Scores Work with the Zacks RankThe Zacks Rank, which is a proprietary stock-rating model, employs earnings estimate revisions, or changes to a company's earnings expectations, to make building a winning portfolio easier.#1 (Strong Buy) stocks have produced an unmatched +25.41% average annual return since 1988, which is more than double the S&P 500's performance over the same time frame. However, the Zacks Rank examines a ton of stocks, and there can be more than 200 companies with a Strong Buy rank, and another 600 with a #2 (Buy) rank, on any given day.With more than 800 top-rated stocks to choose from, it can certainly feel overwhelming to pick the ones that are right for you and your investing journey.That's where the Style Scores come in.To maximize your returns, you want to buy stocks with the highest probability of success. This means picking stocks with a Zacks Rank #1 or #2 that also have Style Scores of A or B. If you find yourself looking at stocks with a #3 (Hold) rank, make sure they have Scores of A or B as well to ensure as much upside potential as possible.Since the Scores were created to work together with the Zacks Rank, the direction of a stock's earnings estimate revisions should be a key factor when choosing which stocks to buy.A stock with a #4 (Sell) or #5 (Strong Sell) rating, for instance, even one with Scores of A and B, will still have a declining earnings forecast, and a greater chance its share price will fall too.Thus, the more stocks you own with a #1 or #2 Rank and Scores of A or B, the better.Stock to Watch: Murphy USA (MUSA)Murphy USA Inc. is a leading independent retailer of motor fuel and convenience merchandise in the United States. The El Dorado, AR-based company, in its current form, came into existence following the 2013 spin-off of Murphy Oil Corporation’s downstream business into a separate, independent and publicly-traded entity.MUSA is a #1 (Strong Buy) on the Zacks Rank, with a VGM Score of A.Additionally, the company could be a top pick for growth investors. MUSA has a Growth Style Score of B, forecasting year-over-year earnings growth of 61.5% for the current fiscal year.Four analysts revised their earnings estimate upwards in the last 60 days for fiscal 2022. The Zacks Consensus Estimate has increased $5.82 to $24.09 per share. MUSA boasts an average earnings surprise of 49%.With a solid Zacks Rank and top-tier Growth and VGM Style Scores, MUSA should be on investors' short list. 5 Stocks Set to Double Each was handpicked by a Zacks expert as the #1 favorite stock to gain +100% or more in 2021. Previous recommendations have soared +143.0%, +175.9%, +498.3% and +673.0%. Most of the stocks in this report are flying under Wall Street radar, which provides a great opportunity to get in on the ground floor.Today, See These 5 Potential Home Runs >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Murphy USA Inc. (MUSA): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research