To answer your question, trading bots work but not for everyone. Trading bot will work successfully only for those who have good knowledge about trading. Also I don't think trading bot will work very well for a new trader. If someone thinks that by using trading bots and will become a rich overnight, then it will be his wrong thought about trading bot, because if you can't drive, you should not seat on the driving seat cz This makes accidents more likely.
Already many people have mentioned above how trading bot works, so there is no need to describe here separately that if you use trading bot without technical and fundamental knowledge, you may face loss.