The problem I see is there are opportunities every day in the markets but not everyone can take advantage of it, some will fail where others will win because everybody has a different perspective to the markets. This leads me to the trading robot, it is after all, a trading system designed by someone, if it works, why would one sell it? they would be better using it to make money instead. Maybe the system does not work? It could be just a selling pitch after all to make money unless one can use it for say a week to try it out, if it doesn't work, its not worth the money. The product should be guarantee to make money but we all know what the answer to this question is.
To prove it, one has to use it to determine its success but usually one cannot use it before it is bought, so if you were to buy it to test out, the seller would have achieved its aim and you would be left with it to test out, you will then discover the answer which you already know the answer.