Profitable Trading Bots do exist and 3Commas provides the best I've seen. They provide the most options as far as setting your trade parameters. You control all aspects of the bot you select to use in regards to how much profit per day you would like to gain. It's quite easy to setup and use as you just need to connect your Trading acoount at the Top Exchanges and select which Bot you want to use. You can use one or more exchanges and trade all of them from the same place with their Smart Trade option. You can use a Bot or trade for yourself from any and all exchanges from one simple, easy to use platform. Personally I prefer to use Smart Trade and trade manually as this is the best way to Arbitrage Trade I've ever seen and I love that style of trading. Of course this is a paid service as you would expect for something of high value, but wait until you see how cheap it is. I made back the fee the first day I traded using their service. 

The Exchages

As you can see this gives you all of the best exchanges from one place. If you've ever wanted try out a Trading Bot than I would highly recommend looking at 3Commas  

Here is a look at the Dashboard options and again you can see this is very robust, but easy to use and control.

They also give you a Free-Trial period to see for yourself if this would work for you. I can tell you that it will and it paid off for me very fast. If you want to give it a spin you can check it out here.