Momentum investing is all about the idea of following a stock's recent trend, which can be in either direction. In the 'long' context, investors will essentially be "buying high, but hoping to sell even higher." And for investors following 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 in that direction. 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 Aluminum (ACH), 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. Aluminum 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?Let's discuss some of the components of the Momentum Style Score for ACH that show why this aluminum maker shows promise as a solid momentum pick.Looking at a stock's short-term price activity is a great way to gauge if it has momentum, since this can reflect both the current interest in a stock and if buyers or sellers have the upper hand at the moment. It's also helpful to compare a security to its industry; this can show investors the best companies in a particular area.For ACH, shares are up 8.03% over the past week while the Zacks Mining - Non Ferrous industry is up 1.98% over the same time period. Shares are looking quite well from a longer time frame too, as the monthly price change of 40.94% compares favorably with the industry's 0.91% performance as well.While any stock can see a spike in price, it takes a real winner to consistently outperform the market. Over the past quarter, shares of Aluminum have risen 73.45%, and are up 283.73% in the last year. On the other hand, the S&P 500 has only moved 6.85% and 33.84%, respectively.Investors should also take note of ACH'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, ACH is averaging 175,243 shares for the last 20 days.Earnings OutlookThe Zacks Momentum Style Score encompasses many things, including estimate revisions and a stock's price movement. Investors should note that earnings estimates are also significant to the Zacks Rank, and a nice path here can be promising. We have recently been noticing this with ACH.Over the past two months, 1 earnings estimate moved higher compared to none lower for the full year. These revisions helped boost ACH's consensus estimate, increasing from $0.68 to $1.51 in the past 60 days. Looking at the next fiscal year, 1 estimate has moved upwards while there have been no downward revisions in the same time period.Bottom LineGiven these factors, it shouldn't be surprising that ACH 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 Aluminum on your short list. Bitcoin, Like the Internet Itself, Could Change Everything Blockchain and cryptocurrency has sparked one of the most exciting discussion topics of a generation. Some call it the “Internet of Money” and predict it could change the way money works forever. If true, it could do to banks what Netflix did to Blockbuster and Amazon did to Sears. Experts agree we’re still in the early stages of this technology, and as it grows, it will create several investing opportunities. Zacks’ has just revealed 3 companies that can help investors capitalize on the explosive profit potential of Bitcoin and the other cryptocurrencies with significantly less volatility than buying them directly. See 3 crypto-related stocks now >>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 Aluminum Corporation of China Limited (ACH): Free Stock Analysis Report To read this article on Zacks.com click here.