Well, I tried out my new EA on USDJPY for the end-of-week session. It was the first time I traded that pair and things went pretty well. I had to adjust some parameters to account for the spreads and digits differences, but after that, it was fine. I had different EAs trading EURJPY and AUDUSD at the same time. The amount of correlation was a bit surprising to me, especially EURJPY and AUDUSD, but all 3 pairs were caught in the down draft... which is cool for me, as the EAs don't care if the price action is up or down.
Still, why does AUDUSD go down when USDJPY goes down? That's just odd! I can understand EURJPY and USDJPY being correlated, as both base currencies have a similar underlying economic relationship to the yen, but what's up with AUDUSD and USDJPY? If anything, it seems like they would move either at random, or perhaps even opposite, relative to each other.
It will be interesting to see if this USDJPY / AUDUSD dance was just a coincidence, or if they really do show correlation.
MM