I see fairly often different expert advisors being made to trade on any currency pair. However, they are never created or tested on all currency pairs. Often there’s only 1 currency pair and it’s made and tested on that. But traders still use it on random currencies and see totally different results. However, I I suspect it is only sensible to have a robot created for one currency pair and trade with it on that one special pair all of the time. That is what Forex Brilliance creators think too and they have developed a suit of expert advisors that trade on explicit major pairs. There’s no bafflement in regards to what to trade it on and on which currency pair it should work better. I think more developers should use this practice. Not just that, when you’re trading manually, you need to consider that to be true for your manual system also. It’s a mere matter of probability, when you test and tweak a system on one pair, it’s sure to perform best on it. Naturally, I don’t say that there aren’t any systems that are universal, but it’s’s lots more hard to create and run such a robot.