An impulsive break and/or solid daily close below all of the yellow uptrend lines on the following index, sector & market-leading stocks (QQQ, XLK, SOXX & MSFT) will trigger a sell signal on the US stock market. If you plan to replicate these trendlines, all of which are generated off the December 24th lows, make sure to use log (aka semi-log) scaling on your charts as linear (aka arithmetic) scaling is likely to render different trendlines.

Once these trendlines are added to your chart, you can set a price alert to trigger if/when each trendline is broken. The more alerts triggering in short proximity, the more likely the remaining indexes, sectors or stocks will follow suit. As of now, all of these key ETFs & stocks remain above those uptrend lines although precarious so, as in just one bad day (i.e.: ~1-3%) away.