Quote from whitster:
concentrating on the money is problematic and a recipe for ruin in the long run, imo
so, a good day trading should be based on how well you traded, not whether the market moved your way.
iow, did you follow your rules, respect the stops, and trade logically
just by the laws of chance, a person could trade very well and lose money in any given day, because all trade setups are probabilistic, not deterministic
i had a day the other week, where i did GREAT trading, but only made 4 dow points. oh well.
due to variance, your results on any given day (and especially any given trade) is loosely correlated with the positive expectancy of the trade, and your skill
but given sufficient trials, it will be very highly correlated.
so, to summarize - a good day trading is where i executed well, traded logically, didn't chase, respected my stops, and didn't overtrade.