Here at Zacks, we focus on our proven ranking system, which places an emphasis on earnings estimates and estimate revisions, to find winning stocks. But we also understand that investors develop their own strategies, so we are constantly looking at the latest trends in value, growth, and momentum to find strong companies for our readers.

Of these, perhaps no stock market trend is more popular than value investing, which is a strategy that has proven to be successful in all sorts of market environments. Value investors use tried-and-true metrics and fundamental analysis to find companies that they believe are undervalued at their current share price levels.

Zacks has developed the innovative Style Scores system to highlight stocks with specific traits. For example, value investors will be interested in stocks with great grades in the "Value" category. When paired with a high Zacks Rank, "A" grades in the Value category are among the strongest value stocks on the market today.

One company value investors might notice is Quest Resource (QRHC Quick QuoteQRHC - Free Report) . QRHC is currently sporting a Zacks Rank #2 (Buy), as well as a Value grade of A. The stock is trading with a P/E ratio of 13.77, which compares to its industry's average of 24.96. Over the last 12 months, QRHC's Forward P/E has been as high as 1,623.43 and as low as -185.71, with a median of 9.81.

We also note that QRHC holds a PEG ratio of 1.53. This popular figure is similar to the widely-used P/E ratio, but the PEG ratio also considers a company's expected EPS growth rate. QRHC's PEG compares to its industry's average PEG of 1.95. QRHC's PEG has been as high as 108.23 and as low as -12.38, with a median of 0.60, all within the past year.

These are just a handful of the figures considered in Quest Resource's great Value grade. Still, they help show that the stock is likely being undervalued at the moment. Add this to the strength of its earnings outlook, and we can clearly see that QRHC is an impressive value stock right now.