Brendan, you can searchcliqforexor even google for GMMA or guppy multiple moving average... that should give you all you need to understand.
Again, this is not meant to be unique to your own system at all, but I want to voice some things I've found in my short trading experience. The thing I've discovered with ALL moving average-based systems, EVEN the GMMA system, is they work excellent when a trend is developing, and work badly when a pair/stock/whatever is ranging or oscillating. Especially with a MA crossover system, if price decides to leap back and forth, MAs will do you no good, and my concern is that following a rigorous system when this is happening will permit you to lose much more than that which you've earned during the nice trending times. I suppose that if you receive a pair that has long-range trending fashions, then you could weather the ranging intervals, but those may last a LONG time.
AgainI hope that your system is going to do very well when your pairs are trending, and probably suffer losses when they aren't. It is not to not have faith on your own body, but it's only that the logic behind why MAs work means this will happen. I suppose RSI and MACD will filter out some terrible transactions, but my guess is they might also filter out some good ones.