Wait, WAT? He shouldn't care that they instructed him wrong because if the market action had been totally different than it was he would have been better off with their bad instructions? Sorry man, that is INSANE. I hope you are trolling with that one lol...
No, you are missing the point. They aren't advising me on trading, it's their own software. If you have software and you are advising on software then I would think you should be liable. The stop loss he advised to set up was not a full stop. It did not into effect overnight.