Hi, I'm NetSalon, the guy that is holding the contest,
Your Design is pretty cool, caught me eye immediately, it is slick, modern...sharp, I like it.
The following are notes that may improve your chances;
The arrow in the F should only run to the second bar in the F, not to the bottom, so the grren arrow and the blue arrow are same size and shape.
The Green shapes that make the X should be either two distinct colors, or one color only, very smooth and uniform, the top one seems a bit ragged, perhaps define the X a bit more. An idea may be to make the bottom shape Red curve down and Top green curve up, this is a naturally occurring condition in the FX Market and people would make the association easily.
The slogan needs to be more legible, easier to read.