The "Starter" settings for each exchange are pasted below. You can take this as a relatively safe starting point and then use the back testing engine to improve upon them according to your own risk profile.

Please let me know if you need help at any step of the way.

We recommend the following starter settings for Mt. Gox:

Short EMA: 10 Long EMA: 21
Buy 1: 0 Buy 2: 0.25
Sell 1: 0 Sell 2: 0.25
2 hour time window.

The following settings are for Bitstamp and BTC-e:

Short EMA: 20 Long EMA: 42
Buy 1: 0 Buy 2: 0.15
Sell 1: 0 Sell 2: 0.1
30 minute time window.


The difference in settings lies in the fact that EMA works differently between high trading fee and low trading fee exchanges.

Pablo.