"do I need to report every trade - winning trades as profit and losing trades as losses?"
Yes.
For this reason, on Form 4797 , as per IRS instructions,
in description, enter "Trader-see attached" and your year over year profit or loss.
Then you will attach the details of every closing transaction that you entered into during the calendar year.
So far, the tax software does not support a PDF transaction detail attachment to Form 4797 so you have to file on paper.
