Traders work on the floor at the New York Stock ExchangeBy way of Ryan Vlastelica NEW YORK (Reuters) – After flirting with an all-time excessive for 3 weeks, the S&P 500 posted its best closing degree in history. However some strategists say Thursday's report is usually a harbinger that the stock market rally is running out of steam. The S&P traded within 10 points of the all-time closing excessive for thirteen classes sooner than breaking via, exhibiting that traders need new catalysts to push firmly above resistance levels. "Because the market has gone higher … …