Interesting idea, but all EMA bots at the moment are based on the Goomboo's Journal. Goomboo, as a trader, suggested that the more simple rules such a trading system has, the more profit it will generate in the long run.

I'm currently working on implementing a backtesting feature for Gekko, when this is done it's pretty easy to test such a system against a lot of data (say the last 12 months). That way it will be a lot easier to say wether such a system will have more success. (Note that are a lot of trading tools already available that support backtesting).