This is a tax, not a turbotax question. Also you are referring to a personal tax product in the business tax forum.
However, if you classify yourself as a trader (see IRS Pub. 550 - you may not qualify), then your trade income would become ordinary business income and you could deduct expenses. You would have to keep track of the sales, profits, etc. yourself or with Quicken, Quickbooks etc. and enter only the totals on Schedule C, not D. Or you could download the trades to Schedule D on a dummy return (don't mix up the files) and enter the totals on Sched D on the real return. Traders cannot take advantage of capital gains rates, however, as it's their business (just like real estate flippers).
