Add Baseline to Horizontal Bar

Hi,

I am comparing different algorithms on a classification task. For that matter I plot the true positive rate as a bar plot. Using the buckets + split series I create the bar plot for all algorithms.
Now, I would like to add a baseline that shows up as a vertical bar or line such that I can see if my new algorithms do any better.

Is this possible with the horizontal bar plot out of the box?

Best,
Lukas