I haven't been posting for quite a while. I have read so many times here that for a trading system to be good, it must work on as many different markets as possible, to prove its robustness, unless there is a very good reason why it should work on one market only. I have developped a trading system for my local stock index (not in the US). After what I think has been very diligent testing, test of robustness, etc etc etc... I have traded it for the past five months. Results in live trading have been perfectly in line with expectations, and even better because volatility has been higher so far this year and my system is supposed to capture that kind of market conditions. Don't get me wrong: I am NOT rich, because I trade small for the time being. But results are in line. I ain't no computer genius, I use Excel as my unique tool, and my system is what most of you guys would consider as indecently simple. I cannot explain WHY I can't make that system work on other markets though. But for the time being I don't plan to stop trading it. Let's see... Anybody else here trading a system that SEEMS to work on one market only ?