Yes trading bots are working, because they automate existing strategies and will reduce the time we need to spend looking after our trades. In the past a few friends from university pooled some money together and we tried out a trading book. It was quite successful, but it only worked with stocks. As long as there are experienced and successful traders beating the market on a consistent basis there will be bots that can run these strategies more efficiently. The real question is can you get your hands on these trading bots, or do you have knowhow to create your own bot. In case you are running successful strategies on your own than you can look into building your trading bot. But if you are looking for a free trading bot that is going to make you a lot of money I don't think it exist. Why should anybody give away his trading bot that works well for free? People would rather sell it for money.