Help with a solution

Hi everyone, 

I run into an issue regarding one of my dashboards, i hope some of you are able to come up with a solution 

As show on the image below i have 3 fields

Field 1: Show the issues
Field 2: Shows the actions 
Field 3: Shows the chart

My issues is with the chart, which contain items on the X axis and amount of error on the Y axis. 
As you can see on the image, there are colored lines that go trough the chart which show when we have initiated an action to better the error´s. I can make the chart without the lines but i have an issue on how to set in the lines. 
Any suggestions on how to achive this?