Or you can simply use the extra amount (instead of asserting net to be zero) and display it as total "withdrawals" or "deposits"
That will show some data, but it will be incorrect as your true Capital Gains, defeating the purpose of the tool.
BTW - the app supports a 'test' apikey (i.e. type test into the apikey form field) to see how it works. It is explained in the FAQ, but so far no one has noticed
