Well that depends on who developed the bot itself, which is why you have to be very careful when choosing one to make your trades, as if it has malware, then it could steal all your coins left on the exchange.
Speaking of bots, the cryptotrader site looks pretty interesting to me in the sense that you could develop one with your very own trading strategy. However, I was looking more into a software rather than cloud based solutions, that would be very similar to the C.A.T. trading software. If there happen to be a very good open source trading software, then I would've put it to good use. Otherwise, I would take the most cheapest alternative to C.A.T.
Nevertheless, if you guys can recommend me of any other good trading software, then please let me know. I'm looking forward to be able to automate my trades in an affordable, and efficient way.