There might be some problems if there are multiple values for same concentration. In that case V Line might be the easiest option. Below is one option which should work
Pen Size(1);
For Each({val, idx}, :Concentration << Get Values,
V Line(val, 0, :Bias[idx]);
);
![jthi_0-1666891990279.png jthi_0-1666891990279.png](https://community.jmp.com/t5/image/serverpage/image-id/46644i657BBD26958F53AC/image-size/medium?v=v2&px=400)
Edit: In some cases it might be enough to change the bar plots summary statistic to min/max. In some cases you might have to add two bar charts, one for Min and one for Max
-Jarmo