line or mark on line chart

hi all,

I want to ask about giving some line/mark in chart line, so it will look just like this.

I want to give mark on certain point (in this case, i want to put mark in axis that shows date '2017/11') because different things happened in that periode. If I use shape, it cannot follow the axes when the slicer date changed. So can someone give interesting trick to do this scenario?

any help would be great.

thanks