VKV, yes you can use losses and other costs as a deduction so long as you are considered a share trader, meaning you regularly buy and sell over a short period. ATO will provide some advice on this. You dont benefit from 50% capital gains discount. But yes you can use those deductions against other income so long as the ATO classify you as a trader.
Otherwise you will use capital losses to offset any capital gain with the benefit of capital losses being able to be carried forward.
Google share trading and ato and you will see some good info i think.
