When there is nothing in the path like a demo account, then you, and I can almost guarantee this, will start trading differently once your hard-earned cash is on the line. Even if you don't think so, I'm sure almost every trader who switches from demo to live can attest to this. In addition, with ECN you are likely to experience slippage, liquidity problems which are not a demo factor. Market Makers will also re-quote, among others, which can generate profits