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 TransDigm Group (TDG), a company that currently holds a Momentum Style Score of A. We also talk about price change and earnings estimate revisions, two of the main aspects of the Momentum Style Score.

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. TransDigm Group 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 TDG that show why this aircraft components 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 TDG, shares are up 1.29% over the past week while the Zacks Aerospace - Defense Equipment industry is up 2.21% over the same time period. Shares are looking quite well from a longer time frame too, as the monthly price change of 6.05% compares favorably with the industry's 8.48% 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 TransDigm Group have risen 11.7%, and are up 58.46% in the last year. In comparison, the S&P 500 has only moved 5.76% and 28.32%, respectively.