Key Takeaways The price-to-sales ratio helps identify undervalued stocks with upside potential when earnings are volatile.OSK, EPAM, GDOT, MOS and PAGS rank well on value screens with strong growth drivers.Each company combines low P/S ratios with fundamentals like innovation, cost control or digital expansion.Investing in stocks based on valuation metrics is a proven strategy for identifying opportunities with strong upside potential. While the price-to-earnings (P/E) ratio is a popular tool for gauging va ...