I realy wouldnt worry about weekend gaps on major pairs. I always have at least a position or 2 open (24/7), and have never been been bothered by weekend gaps. Weekend gaps on major pairs are genaraly small if there is even any gap at all. Furthermore, once in a while I get a litle 20 or so gap against me one week, and then sometime down the road its goes in my favor... no big deal. Finaly, after trading for many years, I have noticed that gaps are becomming less and less frequent over the years as FX liquidity grows.
Don't worry about weekend gaps on major pairs... highly exotic currencies are another story.