Personally, I am using the 8, 18, 50, 100 and 200 on my charts.
18 is a random one, seem to like it with a crossover on the 8.
i find that price reacts more strongly to simple moving averages. i also prefer simple moving averages for recognizing golden crosses and death crosses---when the 50-period crosses the 200-period.
dont waste time and money on this moving averages, just learn what candles are telling , this is only the best indicators
candlestick reading is very important to my analysis, but i also like to incorporate long term moving averages for support/resistance and general trend recognition.