SSRS control values or limits to a column chart

Hi,

I'm building a column chart in SSRS that has a category group and a series group. I need to add some control values or limits to some of the categories.

Here's an example picture of the desired result:

I tried adding a scatter chart to handle the limits but it doesn't work properly because of the series group which wants to draw a dot for each series and also create a legend for each series (or I didn't know how to configure it properly). Is there any way to accomplish this? If it isn't possible to use a dot to indicate the limits other options are welcome.