Usually Consumer Staples, a risk-off sector, has an inverse correlation with the S&P500 . In this chart, strong uptrends in the XLP / SPX (blue line) coincides with S&P500 (green line) corrections or crashes (circles). There is a possibility that the bottom of the XLP / SPX was the below white line in the chart, while the top one, a historically strong support/resistance , could have a significant role in the following weeks or months. If this white line is broken in the future, it could mean, in the worst case scenario, the confirmation of a bear market or a crash.
Again, lines in the sand, nevertheless, I believe this are times to be extra careful.
(This idea was developed based on a Game of Trades analysis).