gap up, gap down, 2-day chart
With markets this volatile your basic charting (which I use all day due to the simple way all the important information is displayed) is insufficient. If a stock closes at 10 and opens at 6 you smooth out the curve instead of displaying the gap as a vertical cliff.
Likewise, I'd really find a simple 2-day chart option helpful.
While I'm wishing, you show pre-market and after-market pricing, which is great, but I would really like a 1 & 2-day chart that shows pre and post market pricing in graph form.