I am using a combo chart and I have managed to reach as shown below
Below is the output that I am seeking. I am trying to add a vertical line for a specific date (say 11th Jul)
I googled a lot but unable to find a solution. I came across something which is closer to what I need. Embedding a vertical reference line in Excel but I am unable to achieve this as there is already a secondary axis. What is the best way to handle this?




