Why does mixing apples and oranges work for juice but not for a chart? To create effective data visualizations, understanding the purpose of the chart is key. Selecting the most efficient chart for the job requires knowing 'What' and 'Why' before 'How'. The Eurostat chart related to EU trade with Russia is an example of how easy it is to make mistakes. The chart's design is neat but fails to optimally present data, making comparison difficult. Making small formatting changes can make data more coherent and comparison effortless. #datavisualization #Eurostat #datacleaning