When a stock breaks well-defined support, then that support becomes the resistance.
In my article, Reading S&P500, I mentioned about 4100 as the key resistance and how the market can fool everyone with rise. Yesterday, it rallied to levels near 4100 creating short-term enthusiasm and today got a perfect excuse to sell off. S&P 500 is down 3% now and Corporate America is warning about inflation and economic slowdown with absolute clarity. The sell-off has been steep and the traders who bought the market yesterday learned the lesson again. It’s a bear market where you don’t buy the dip but sell the rally.