Trading with bot is good, that it makes a minimum profit with consistency on successive trades. This cannot be guaranteed with the manual trading. This is possible when the price seems to fluctuate within certain price range and while exceeding too it makes profit but not the peak.
Although the profit is not the maximum, but you can also get a big one because the bot keep trading while you can't do it. And it's not like you can always get the highest possible profit when trading manually.
For the OP, you should try C.A.T bot as they support a lot of exchange.