I think a lot of investors would like to see the current value of their holdings in their original currency amount. I definitely would love to see that myself.
It would be great to have an extra option next to the “Showing Percentage Gains” in the portfolio overview section where you can toggle the “Value” of your holdings between their original currency and your portfolio base currency amounts.
The “Total” value of your holdings can just be in your portfolio base currency.
Morningstar does something similar in they portfolios.