Exponential Moving Average or any average has parameters. Most commonly used triple moving average is 4, 9 & 18. Trading is not a prediction game its a probabilities game. So there is no fixed values which work for every one.
Choose the one which suits you, research well with what ever your methods and indicators are going to be. Once you are inclined with it, then patience is most important. Patience pays well for good profitable trades as well as good systems.
Do not complicate any method, keep it as simple as possible. Only simple theories last long. All these are live experiences.