So for the last 3 months, I've been day trading, but only making 3-4 trades a day trading the 500 shares of the SPY, which is equivalent to one contract of the ES. But anyways, I've been trading on my etrade account and each trade is 7.99. I looked at my performance for the last 3 months and i'm break even, but i've racked up commissions of over 5000. By switching to a per share basis commission broker, let's say IB, they charge .005 per share which is 2.50 for 500 shares. This would lead me to believe that I could be profitable with the lower commissions. Should I have any doubts?