"Today's market is brought to you by the number four," Jim Cramer told RealMoney Radio listeners Thursday, noting that with the market up for the fourth straight session, this is the best rally we've seen since May 11. (The S&P 500 and Nasdaq both subsequently fell into negative territory in recent trading.) Even with turmoil in the Middle East, rising gas prices, a weak quarter from UPS ( UPS), the downgrade of FedEx ( FDX) and Dow Chemical ( DOW) being down 10%, the upswing continues. But Cramer said it's time to throw some rain on the parade because when the market is going higher, it's time to lock in profits. Don't get complacent, he said, reiterating that he likes to buy low and sell high. He said that weakness in consumer stocks combined with a spike in utilities and insurance companies points to a "severe slowdown that could take people by surprise." Weakness at Black & Decker ( BDK) points to trouble in consumer stocks, he said, adding that he would be worried about other retailers like Federated ( FD), J.C. Penney ( JCP) and Kohl's ( KSS). Even though he bought Sears ( SHLD) for his charitable trust
Action Alerts PLUS , he added that it might not be spared, either.