Using the comparison feature you can overlay a chart of your base currency. Then using the transparency settings you can adjust the visibility. You can also choose the style of chart used and the colors. I always check my BTC to see where it is. Trying to avoid buying when BTC is high and selling when it's low and losing the difference. This is a quick and actually nice looking chart of your purchasing funds set as your chart background. I'm sure I'm not the first to suggest this but thought I would share anyway.