It would be useful if there is a column for Net Profit on the History page. There is a column for gross profit and fees, this would simply be the difference.
I'd like to have a graph that shows my net profit and loss, too
Would also like to see one on my "shares" page so I don't have to look at all of my holdings to see which are up and which are down by checking my average share price against the latest price.
I especially would like this in markets where a lot of trades occur in a very short time, e.g. Obama approval weekly market. Many traders move thousands of shares through that market, and it would be great to have a summary of net profits/losses in the history tab.