According to @CNBC, Wall Street is watching a specific S&P 500 level to decide whether the market uptrend remains intact (source: CNBC). The report highlights that this single index level is being used as a practical gauge for trend confirmation by market participants (source: CNBC). For traders seeking the exact threshold to calibrate risk, CNBC directs readers to the full article detailing the level in focus (source: CNBC).