I did find that I had to do a couple more things to get a traditional box-and-whisker plot.

1. Change the scale of the right Y-axis to be the same as the left Y-axis (since it’s a stock plot, it assumes the volume is on a different scale than the rest of the data and determines the range of that axis separately from the other axis — but of course I want the volume value to align with the “open/close/low/high” values).

2. Unfortunately, the default is that the volume is shown (on my version) in dark purple, *under* the box for the open/close/low/high. It also wouldn’t let me make the box fill transparent in order to show the upper line of the volume box. So I couldn’t see the “median” line that normally goes across the center of the box. The only way I could find to do this was in three steps:

(a) change the fill of the box to “none” so you can see the volume bar underneath
(b) use the drawing tool to draw lines across each box at the right place
(c) change the fill and border of the volume bar to “none” so that it won’t show up at all.

Pretty clunky and tedious but it works as long as our data doesn’t ever change.