How the value of holdings and cash at the top of the page keeps changing. I found the total value of everything incredibly helpful for a quick glance at where I stood. Also, the total value of holdings is helpful as opposed to the new invested value and profit. This is especially true on smart phones, where I only see the gain/loss and cash, which is not helpful as shares sell.
So, my ideal top line summary would be:
Value of shares
Perhaps this could be something users could customize to meet their own needs.