ratio of commissions and spreads

ratio of commissions and spreads on my ECN account at Fxcess is the most favorable trading conditions that I have ever had. my spreads here are from 0 pips. and at the same time, I don't pay too much commission. so I'm basically trading 0.04 lots. this means that commission for each order is 18 cents. that's all I pay for trading with perfect order execution and zero spreads. for sure this can be called profitable offer