A solid system is what is the most important. So that the best program would trade with a solid strategy and decent money and risk handling. It sounds easy, but there are few expert advisors that may be able to do this. And there are many that are outright losers.

So when you look out for the best currency exchange system, look for one that appears to have a reasonable strategy first. Then look for confirmation that it actually works. Don’t go for a new big thing once it is released, wait for it to prove itself in live trading. Search for old bots that folks are still using, because if somebody is still using a system one or two years down the line, means it is worth something.