Cramer issues a warning to the bulls: Too many groups are lagging behind the market leaders

"Mad Money" host Jim Cramer tells investors to curb their expectations until weaker market sectors join the rally. Cramer applauds the strength in technology and retail stocks, but grows concerned that if not enough sectors follow, it could mean doom for the rally. The major averages may paint an ideal picture for the stock market, but CNBC's Jim Cramer warned on Tuesday that some strong sectors aren't enough to sustain a long-term rally.