Learn 12-sided triangular arbitrage (forex): http://www.smarthelping.com/p/training-course.html
Interesting day as I was able to close out the full synthetic for a net profit of nearly 3%. I did have the nzd/usd leg off just to clear off some of the margin from yesterday, but now with a new set of 8 on and that profit things should start to run a bit smoother. I would suggest at least having 10% free margin with this. Personally, when I started last Friday I had less than 1%.