This is interesting I have never used such software! Can you give more info on what are the main features of the program. Also if it works why are you selling it? It looks to me like a move backwards since it have most probably payed off.
Main features is having the ability to connect to any, or as many exchanges as you like simultaneously and having the ability to create buy and sell rules based on the criteria you specify to automatically make trades for you. Basically it can trade beyond human capabilities 24-7 once you setup what you want it to do. The dev is great and will help you whenever you need it and he is constantly working with the community to add features and keep it updated.
Reason i'm selling? Pure and simple, I need the money. I will make manual trades direct on the exchanges for now. I have every intention of buying back C.A.T once i can afford it hopefully soon!