Add Annotation in Charts

Hello

I am running some reports for an IT company which captures the number of tickets per month

in specific scenarios there are increases in the numbers which we drill through and document the reasons

i am trying to somehow add short explanations in certain points in the chart that will remain there on the long run to reduce effort to drill through each time and have it somehow dynamically available 

the chart looks something like this. Thats a PowerPoint chat bouble which i added as an idea

i tried so far custom visuals from the store, some DAX measures which i can't seem to make them work (nor do i understand them much) and tooltips (but can only make those appear throughout the whole chart)

Any chance someone has a simpler solution for a not-so-knowledgable DAX user? scoured all over the place for a solution for the past days