SMA as well as EMA are good tools to see the trend of the market. Some people just trade using the sma and macd and making good profits. So the best thing to do is to concentrate on 2 - 3 indicators and work out with it for a considerable period so as to know the pros and cons of the indicator and then try another 2-3 sets of indicator. Its a proper ways to learn instead of hopping around from one indicators to another searching for the holy grail.