what if it doesn't fail? At least there are records to know how it has been performing. STPwinner, for example, averages some steady returns. The only issue is that you might need a large account to keep being consistent. Even though the minimum deposit is $2,500, in my experience sometimes the robot takes large trade volumes that an account that isn't big enough might not be able to withstand. Before I had the money to subscribe to the STP winner, I was using a robot I bought from a trading firm, I stopped using it because it had low returns