I spent the last few days going back to day-trading again. I'm pleasantly surprised to be making money.
Here are the stats (note that I'm trading micro-lots in my day trades).
Trades opened since 1 Jan 2015: 33
Win rate(%): 42.4%
Size of average winner (excluding commission): $1.09
Size of average loser (excluding commission): $-0.59
Profit factor: 1.86
Gross profit: $4.13
Commission paid: $-1.82
Net profit: $2.31
% Profit lost to commission: 44%
That last figure is quite discouraging. I'm wondering how this number compares to longer-term traders.