It sounds horrid. Like the end of times. A Death Cross. What good could ever come of this? It conjures up foul images. Carnage and debauchery. Blood and gore everywhere. This is why we hear of it. It makes for good clickbait. But what about those Death Crosses?
A cross of the 50 day SMA down through the 200 day SMA, it technically signals a short term reversal. The short term smoothed price action dropping faster than the long term smoothed price action. Certainly a change in momentum. And if the big drop is coming this will definitely happen. But a Death Cross happens a lot more frequently than just preceding a market crash.