Monday, February 26, was a red-letter day for the U.S. stock market. Stock Market Signals 'That's All, Folks!' First, there was a quick test of the lows that petered out at the 200-day moving average. One was the 50-day moving average, a particularly useful trend measure in bull markets. It would take a deeper and/or longer-lasting decline to turn the moving average downward, the bearish signal.
Source: Forbes February 27, 2018 13:52 UTC