Chose legible typefaces, avoid serif and highly decorative fontsAvoid italic, bold, and ALL CAPSEnsure high contrast with the backgroundDo not rotate your text

Avoid confusing dual-axis

Always start a bar chart at 0 baselineTruncation leads to misrepresentation. On the example below, looking at the chart on the left, you can quickly conclude that value B is more than 3 times greater than D when in reality the difference is far more marginal. Starting at zero baseline ensures that users get a much more accurate representation of data.

2. Use correct plotting directions based on the positive and negative valuesWhen using horizontal bars, plot negatives values on the left side and positive on the right side of a baseline.

Choosing the wrong chart type, or defaulting to the most common type of data visualization could confuse users or lead to data misinterpretation. The same data set can be represented in many ways, depending on what users would like to see. Always start with a review of your data set and user interview.