Perhaps the whole universe including us is random so I wouldn't worry about that :)

In all seriousness, it's actually very easy to follow the robots in a relax way. Since the robots have an initial stop loss one can objectivly position size every trade to the same account % risk. Choose an account % risk you are psychologically comfortable with and that's it. Don't be greedy ... start with a small account % risk and increase it as success follows.

http://www.iitm.com/sm-position-sizing.htm