Momentum investing revolves around the idea of following a stock's recent trend in either direction. In the 'long' context, investors will be essentially be "buying high, but hoping to sell even higher." With this methodology, taking advantage of trends in a stock's price is key; once a stock establishes a course, it is more than likely to continue moving that way. The goal is that once a stock heads down a fixed path, it will lead to timely and profitable trades.Even though momentum is a popular stock characteristic, it can be tough to define. Debate surrounding which are the best and worst metrics to focus on is lengthy, but the Zacks Momentum Style Score, part of the Zacks Style Scores, helps address this issue for us.Below, we take a look at Exxon Mobil (XOM), which currently has a Momentum Style Score of A. We also discuss some of the main drivers of the Momentum Style Score, like price change and earnings estimate revisions.It's also important to note that Style Scores work as a complement to the Zacks Rank, our stock rating system that has an impressive track record of outperformance. Exxon Mobil currently has a Zacks Rank of #2 (Buy). Our research shows that stocks rated Zacks Rank #1 (Strong Buy) and #2 (Buy) and Style Scores of A or B outperform the market over the following one-month period.You can see the current list of Zacks #1 Rank Stocks here >>>Set to Beat the Market?In order to see if XOM is a promising momentum pick, let's examine some Momentum Style elements to see if this oil and natural gas company holds up.A good momentum benchmark for a stock is to look at its short-term price activity, as this can reflect both current interest and if buyers or sellers currently have the upper hand. It's also helpful to compare a security to its industry; this can show investors the best companies in a particular area.For XOM, shares are up 2.05% over the past week while the Zacks Oil and Gas - Integrated - International industry is up 3.04% over the same time period. Shares are looking quite well from a longer time frame too, as the monthly price change of 11.18% compares favorably with the industry's 12.69% performance as well.Considering longer term price metrics, like performance over the last three months or year, can be advantageous as well. Over the past quarter, shares of Exxon Mobil have risen 11.22%, and are up 77.76% in the last year. In comparison, the S&P 500 has only moved 0.14% and 27.06%, respectively.Investors should also take note of XOM's average 20-day trading volume. Volume is a useful item in many ways, and the 20-day average establishes a good price-to-volume baseline; a rising stock with above average volume is generally a bullish sign, whereas a declining stock on above average volume is typically bearish. Right now, XOM is averaging 25,593,484 shares for the last 20 days.Earnings OutlookThe Zacks Momentum Style Score also takes into account trends in estimate revisions, in addition to price changes. Please note that estimate revision trends remain at the core of Zacks Rank as well. A nice path here can help show promise, and we have recently been seeing that with XOM.Over the past two months, 7 earnings estimates moved higher compared to none lower for the full year. These revisions helped boost XOM's consensus estimate, increasing from $4.48 to $4.91 in the past 60 days. Looking at the next fiscal year, 6 estimates have moved upwards while there have been 1 downward revision in the same time period.Bottom LineGiven these factors, it shouldn't be surprising that XOM is a #2 (Buy) stock and boasts a Momentum Score of A. If you're looking for a fresh pick that's set to soar in the near-term, make sure to keep Exxon Mobil on your short list. Time to Invest in Legal Marijuana If you’re looking for big gains, there couldn’t be a better time to get in on a young industry primed to skyrocket from $17.7 billion back in 2019 to an expected $73.6 billion by 2027. After a clean sweep of 6 election referendums in 5 states, pot is now legal in 36 states plus D.C. Federal legalization is expected soon and that could be a still greater bonanza for investors. Even before the latest wave of legalization, Zacks Investment Research has recommended pot stocks that have shot up as high as +285.9%. You’re invited to check out Zacks’ Marijuana Moneymakers: An Investor’s Guide. It features a timely Watch List of pot stocks and ETFs with exceptional growth potential.Today, Download Marijuana Moneymakers FREE >>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 Exxon Mobil Corporation (XOM): Free Stock Analysis Report To read this article on Zacks.com click here.