I tried to use EMA @ 25,50,100 based on the strategy of another trader, but found it very risky.
The EMA's move to quickly from a enter signal to an exit without any real pip gain. Even combining them with Stochastics, P SARS, and B Bands does absolutely nothing on a 5 min. chart except throw away money.
More reliable to use the EMA's with P SARS and Stochastics on a 1 hour with a 15 min. verifier.
And that's about all I know about trading....