Build your first prototype in the language you are most comfortable using. When you know which bits are hard to write then you can look around and see if any ot

Build your first prototype in the language you are most comfortable using. When you know which bits are hard to write then you can look around and see if any other language has facilities that make that part of the task simpler to write. Whichever way - enjoy the learning experience. I doubt you will make your fortune trading currencies - but I could be wrong so good luck.