Price crossing MAs is often used to trigger trading signals. When prices cross above the MA, you might want to go long; when they cross below the MA, you might want to go short.
Here we can see price crossing MA50 both ways.
MA Crossing MA is a common trading signal. When a short period MA crosses above a long period MA, you may want to go long. You may want to go short when the short-term MA crosses back below the long-term MA.
Here we can see MA50 crossing MA200 both ways, each resulting in a corresponding trend.