It's REALLY annoying not being able to see what price at which the stock closed at 4pm. You blend the premarket and after hours into the main price quotes, so it's not possible from the portfolio page to see what happened during market hours. This is really counterproductive when trying to do stock analysis and see moves from binary events that impact the price before and after hours.

Same goes for the chart in the portfolio view. By mixing the pre and after hours into the chart, it reduces the utility of the chart during the most important trading hours.