On Bitfinex i think are the lowest fees 0.15% per buying and selling. and if u wanna trade a lill bit more risky, you can choose to margin trade where a leverage is 2.5:1.
I've been pretty bullish lately but I do have one concern. The injection of fiat into bitstamp order books seems to have stopped. There isn't any more fiat on the books nows than there was in the past week in the 500 levels. The amount of selling (in btc) to reach 400 is exactly the same and the total amount of fiat on the books is actually LESS because all the bids in the 300s and 200s were removed. If I don't see another fiat injection in the next week, I am going to get really concerned.
I'd be more concerned by that $633 flash crash. Where the hell is Slovenia, anyway? It's 2014 and I can't believe we don't have better exchange options yet. Huge entrepreneurial opportunity for somebody who can recognize the need for transparency.
Go back to school and you will know where Slovenia is. It seems it is leading country for cryptocurrency trading. Still waiting for someone else from respectful country like yours to show something better. Some have Hitler and Bosh, some have Bush and you, but we have Bitstamp.