CarMax (KMX) reached a significant support level, and could be a good pick for investors from a technical perspective. Recently, KMX broke through the 20-day moving average, which suggests a short-term bullish trend.A well-liked tool among traders, the 20-day simple moving average offers a look back at a stock's price over a 20-day period. This is very beneficial to short-term traders, as it smooths out short-term price trends and gives more trend reversal signals than longer-term moving averages.Similar to other SMAs, if a stock's price moves above the 20-day, the trend is considered positive, while price falling below the moving average can signal a downward trend.Over the past four weeks, KMX has gained 14.4%. The company is currently ranked a Zacks Rank #1 (Strong Buy), another strong indication the stock could move even higher.The bullish case only gets stronger once investors take into account KMX's positive earnings estimate revisions. There have been 5 revisions higher for the current fiscal year compared to none lower, and the consensus estimate has moved up as well.Given this move in earnings estimate revisions and the positive technical factor, investors may want to keep their eye on KMX for more gains in the near future. Breakout Biotech Stocks with Triple-Digit Profit Potential The biotech sector is projected to surge beyond $775 billion by 2024 as scientists develop treatments for thousands of diseases. They’re also finding ways to edit the human genome to literally erase our vulnerability to these diseases. Zacks has just released Century of Biology: 7 Biotech Stocks to Buy Right Now to help investors profit from 7 stocks poised for outperformance. Our recent biotech recommendations have produced gains of +50%, +83% and +164% in as little as 2 months. The stocks in this report could perform even better.See these 7 breakthrough 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 CarMax, Inc. (KMX): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research