
Weber, Inc (NYSE:WEBR) was plunging about 12% at one point Tuesday after failing to hold above the 200-day simple moving average, despite the algorithms gapping the stock above the area to start the day.
The 200-day SMA is an important bellwether. Technical traders and investors consider a stock trading above the level on the daily chart to be in a bull cycle, whereas a stock trading under the 200-day SMA is considered to be in a bear cycle.