While the proven Zacks Rank places an emphasis on earnings estimates and estimate revisions to find strong stocks, we also know that investors tend to develop their own individual strategies. With this in mind, we are always looking at value, growth, and momentum trends to discover great companies.

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 rely on traditional forms of analysis on key valuation metrics to find stocks that they believe are undervalued, leaving room for profits.

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 to watch right now is Flexible Solutions International (FSI Quick QuoteFSI - Free Report) . FSI is currently sporting a Zacks Rank of #2 (Buy), as well as a Value grade of A. The stock holds a P/E ratio of 12.87, while its industry has an average P/E of 18.19. Over the last 12 months, FSI's Forward P/E has been as high as 26.26 and as low as 5.63, with a median of 11.16.

Finally, we should also recognize that FSI has a P/CF ratio of 8.92. This metric focuses on a firm's operating cash flow and is often used to find stocks that are undervalued based on the strength of their cash outlook. This stock's P/CF looks attractive against its industry's average P/CF of 21.81. Over the past 52 weeks, FSI's P/CF has been as high as 14.89 and as low as -36.80, with a median of 8.92.

Value investors will likely look at more than just these metrics, but the above data helps show that Flexible Solutions International is likely undervalued currently. And when considering the strength of its earnings outlook, FSI sticks out at as one of the market's strongest value stocks.