Stock market in the daily newspaper is tricky. Because: The prices are from yesterday. There are new ones today. And tomorrow. What's important? Mood? Yesterday's? Exact index level? Change? Absolute? [...]

This one took me a while. Looks harmless. The biggest one on bottom, the smallest one on top. Together they are decreasing. Got it. The strongest drop is Chrysler. The second-strongest Ford. The least [...]

Our eyes read lines like this: flat line = little change. Inclined line = more change. Steeply inclined line = a lot more change. It's all wrong here. You believe right increases more than left. Wrong. Scales [...]

When managers and statistics collide, less is often more. In general, however, there are not enough statistics in data visualizations. The only requirement is that they need to be robust.