Hi @kw, yes the exchange fees were super eye-opening. We tried connecting to Binance.us with our current API, but it doesn’t work. So we will instead add Binance.us as a new “supported exchange.” The guts are all the same, so we should have that available very soon.
In terms of taxes, it ends up being too complicated for that sort of calculator (variance by income, country, and taxes are tracked on a per-trade basis). Given that tax is applied to any income–which is why companies report earnings before income tax, depreciation, and amortization–we thought it best to leave off for now. Though I agree, it would be good to see. Maybe we can have a calculator specific to taxes.