Investors interested in stocks from the Technology Services sector have probably already heard of Rocket Companies (RKT) and Trane Technologies (TT). But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look.We have found that the best way to discover great value opportunities is to pair a strong Zacks Rank with a great grade in the Value category of our Style Scores system. The Zacks Rank is a proven strategy that targets companies with positive earnings estimate revision trends, while our Style Scores work to grade companies based on specific traits.Right now, Rocket Companies is sporting a Zacks Rank of #2 (Buy), while Trane Technologies has a Zacks Rank of #3 (Hold). The Zacks Rank favors stocks that have recently seen positive revisions to their earnings estimates, so investors should rest assured that RKT has an improving earnings outlook. However, value investors will care about much more than just this.Value investors also tend to look at a number of traditional, tried-and-true figures to help them find stocks that they believe are undervalued at their current share price levels.The Value category of the Style Scores system identifies undervalued companies by looking at a number of key metrics. These include the long-favored P/E ratio, P/S ratio, earnings yield, cash flow per share, and a variety of other fundamentals that help us determine a company's fair value.RKT currently has a forward P/E ratio of 7.34, while TT has a forward P/E of 29.28. We also note that RKT has a PEG ratio of 0.73. This figure is similar to the commonly-used P/E ratio, with the PEG ratio also factoring in a company's expected earnings growth rate. TT currently has a PEG ratio of 1.38.Another notable valuation metric for RKT is its P/B ratio of 3.89. Investors use the P/B ratio to look at a stock's market value versus its book value, which is defined as total assets minus total liabilities. By comparison, TT has a P/B of 6.53.These are just a few of the metrics contributing to RKT's Value grade of A and TT's Value grade of C.RKT has seen stronger estimate revision activity and sports more attractive valuation metrics than TT, so it seems like value investors will conclude that RKT is the superior option right now. 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 Rocket Companies, Inc. (RKT): Free Stock Analysis Report Trane Technologies plc (TT): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research