I don't automate it also because I'm not looking for very short trade movements, but more like in periods of 8 hours. So I either buy or sell my complete position in the coin, generally operating 2-3 coins.
I've tried trading with a bot with this system, created by myself, but I've found out that it's better to set up a trade with a stop, use the criteria of whether using a coin or the other and just sell it after a few hours, as hype usually lasts for a couple of hours as news travel fast, so do people start selling off early. You generally want to analyse it yourself how much hype there is.
Note that I don't believe in cryptocoins as they are, for me they are bullshit without a business model or intrinsic value, but some clueless people think they are "investing" on it, so I'm there to make profit out of their lack of knowledge.
With 3-4 trades a day, there's much window to make like 10% a day, even though it sounds crazy, some coins got some big volatility.
Also, some days I stay out of the market, based on my criteria. Some days things will just go generally down after sometimes after weeks of gains. It's better to stay out with your money than in the game to lose.
I recommend Gemini.com (Winklevoss twins involved in this company)
Then I recommend Bittrex.com and Binance.com for the top two exchanges right now. I can see Binance overtaking Bittrex eventually, it recently launched but has it's own coin and is going to become decentralized eventually.
https://www.binance.com/resources/ico/Binance_WhitePaper_en....