It may be advisable to keep good records (even though that might indicate that you are seriously trading). When you buy a particular share you note that the purpose of that share is for keeping and thus should attract CGT credits. And of course you have to realise that markets move in funny ways and that can be up or down. It is a bit hard to count chickens when they are still eggs. And of course should you then occur a loss you may not offset it against your profits but need to offset it against capital gains. If you look at it from the ATOs point of view you will probably understand their side. On the other hand if you do understand their ideas it will be easier to deal with them.
Good luck with your trading and with dealing with the tax department
