Flotek Industries (FTK) has been beaten down lately with too much selling pressure. While the stock has lost 20% over the past four weeks, there is light at the end of the tunnel as it is now in oversold territory and Wall Street analysts expect the company to report better earnings than they predicted earlier.Guide to Identifying Oversold StocksWe use Relative Strength Index (RSI), one of the most commonly used technical indicators, for spotting whether a stock is oversold. This is a momentum oscillator that measures the speed and change of price movements.RSI oscillates between zero and 100. Usually, a stock is considered oversold when its RSI reading falls below 30.Technically, every stock oscillates between being overbought and oversold irrespective of the quality of their fundamentals. And the beauty of RSI is that it helps you quickly and easily check if a stock's price is reaching a point of reversal.So, by this measure, if a stock has gotten too far below its fair value just because of unwarranted selling pressure, investors may start looking for entry opportunities in the stock for benefitting from the inevitable rebound.However, like every investing tool, RSI has its limitations, and should not be used alone for making an investment decision.Why a Trend Reversal is Due for FTKThe RSI reading of 29.45 for FTK is an indication that the heavy selling could be in the process of exhausting itself, so the stock could bounce back in a quest for reaching the old equilibrium of supply and demand.This technical indicator is not the only factor that calls for a potential rebound for the stock. There is a fundamental indicator as well. A strong agreement among sell-side analysts covering FTK in raising earnings estimates for the current year has led to an increase in the consensus EPS estimate by 7.1% over the last 30 days. And an upward trend in earnings estimate revisions usually translates into price appreciation in the near term.Moreover, FTK currently has a Zacks Rank #2 (Buy), which means it is in the top 20% of more than the 4,000 stocks that we rank based on trends in earnings estimate revisions and EPS surprises. This is a more conclusive indication of the stock's potential turnaround in the near term. You can see the complete list of today's Zacks Rank #1 (Strong Buy) stocks here >>>> More Stock News: This Is Bigger than the iPhone! It could become the mother of all technological revolutions. Apple sold a mere 1 billion iPhones in 10 years but a new breakthrough is expected to generate more than 77 billion devices by 2025, creating a $1.3 trillion market. Zacks has just released a Special Report that spotlights this fast-emerging phenomenon and 4 tickers for taking advantage of it. If you don't buy now, you may kick yourself in 2022.Click here for the 4 trades >>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 Flotek Industries, Inc. (FTK): Free Stock Analysis Report To read this article on Zacks.com click here.