You should watch this Billion Dollar Day Documentary on currency speculative trading. This Billion Dollar Day Documentary shows how the bank traders trade. In this documentary you learn how 3 traders gambled big on how Pound/Dollar will turn. One traders is based is London, the second is based in Hong Kong and the third is based in New York. All 3 are engaged in high stakes electronic poker game. One day they bet $1000 million on a single trade. Watch the documentary and learn what happens.