When I first became interested I was writing systems on wealth lab's free site. It allowed me to experiment with the idea of systems and automated trading to see if I liked it. After I decided to try some real time systems trading I chose to open a forex account. Being a 24 hr market with round the clock liquidity is seemed ideal. But when I opened my forex account, I found that the systems I had written failed in the forex market. I tried my systems and those of other members, but I found that only a few of them would even back test successfully after adapting them. Meanwhile new ideas that I had would be successful again on wealth lab and not in forex. I know that wealth lab's site only offers backtesting, and backtesting is not indicative of actual results, but is it possible that some markets may be more predictable than others? I know it could also be because I have much more experience in the equities market that I have an easier time writing scripts for it, but I was wondering if anyone else has found some markets better than others for systems trading?