Would never trust any robot unless i had the chance to inspect the source code thoroughly and fully understanding what it does and most importantly, what type of risk management is implemented. Even then, i would be sceptical because if it was that simple, everyone could just buy a robot and sit back and count all the profits.
The only way i would be interested (and i am) is if i could code the strategy myself or if someone helped me code it just the way i want it. Unfortunately, there is currently no way to do this for stocks that i am aware of but i will welcome the day when this opportunity exists.