<HTML>When I posted these chart, Nasdaq was under 2000. And MA(200) was the resistance line. People was waiting for 200MA crossing to ensure bullish.
Now, we all knew Nasdaq is over 2000. Hence, old resistance line became support line. When Nasdaq goes below 2000, the market may become bearish.
MA(50) reacts to change faster than MA(200). We only compare real value with MA in most of time. However, multiple MA crossing in uptrend is good. As I know, they care MA ribbon. Say, draw MA(10,20,40,60,80,100,120). If they are all bullish crossing, the market is going up.