Rentech, Inc. RTK was a big mover last session, as the company saw its shares rise more than 8% on the day. The move came on solid volume with far more shares changing hands than in a normal session. This continues the recent uptrend for the company since Mar 24, as the stock is now up almost 81%. In the last 30 days, the company has seen one downward estimate revision and the Zacks Consensus Estimate also moved lower, suggesting there may be trouble down the road. So make sure to keep an eye on this stock going forward to see if this recent move higher can last. Rentech currently carries a Zacks Rank #3 (Hold), while its Earnings ESP is 0.00%.A better-ranked Biofuels stock is Enviva Partners, LP EVA, which sports a Zacks Rank #1 (Strong Buy).Is RTK going up? Or down? Predict to see what others think: Up or DownWant 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 >>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 RENTECH INC (RTK): Free Stock Analysis Report ENVIVA PARTNERS (EVA): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research