Don't be surprised if this bot is running a specifically unoptimized algorithm to decide how to trade, which in turn leads to more profitability for the creator. Never trust bots that aren't programmed by yourself. The only bot that can truly be on your side is one you've written from absolute scratch.
The code is open source. Anyone can check the code to see if there's any weird stuff going on.
+1 If you can't read the code, then I guess you're back to square 1 and can't trust it, though. But we can collaborate and make something even better. I did a search a few days ago and didn't see any similarly developed bots. This one for btc-e.com looks worth looking into, but seems to be tackling a different problem of arbitrage between exchanges by using BitInstant as the cheapest way of moving currency to complete the loop.
http://btctrader.blogspot.ru/2013/03/faq.htmlBut it's true, you have to leave a PC running all the time to watch the market. How to get around that? 1) Buy a Beagleboard or Rasberry Pi, install Chrome, and run that (maybe 5W power vs 60-140W for normal PC). 2) Maybe modify the bot or create another one that can be run on a cloud server.