Line charts are the ideal way to show historical data when ‘understanding the trend or path of a metric’ is what your decision maker is after. Like most good visualizations they can be extremely data dense, showing lots of information in a small visual space. What would enhance the value of the visual is more context; some data points can benefit highly from some extra explanation as to what happened on that day or in that month. Did a law change? Did a store open? What’s behind the outlier or trend break?
Pop-up annotations in a chart allow you do add just this kind of rich narrative information into your data dense charts. In this video we’ll show you a nice, quick way to implement that in Power BI.