The attached picture explains it pretty well. I only do it on the EURUSD 4H chart and I use leverage of 1:1 (since it's a pretty long timeframe you have to be ready for some big swings in the negative). I simply go long when the MA's cross and switch my position when they cross the other way. On the upward trend (which started at the end of April) I closed with just over 1700 pips. On the current downward trend, I'm just over 450 pips. This is just one of the few strategies I use. Its been pretty good, only thing that kinda sucks is the swap. Hope this helps some of the new fx traders.