I will never forget the day silverback posted the crossing of the 200 day on the down side. "Death Cross" Of course I had my doubts about this tecnical event, however i now believe and hope it works on the upside as well.
Golden Cross
The golden cross is a chart pattern created when a shorter term moving average was below a longer term moving average, but it crosses above that moving average. This is typically seen as a bullish signal.
The golden cross is mostly used with longer term moving averages. It's an especially strong signal when the 50 day moving average crosses above the 200 day moving average.