Techniques for visual representation of chart scaling are described. In implementations, a chart is employed to display data associated with a resource. Examples of such a resource include a computer hardware resource, a network resource, a financial resource, a commodity (e.g., a manufactured commodity), and so on. In implementations, a chart is associated with a scale that corresponds to a set of data values represented in the chart. Further, a chart can be rescaled to display data values in a variety of different scales, e.g., that correspond to different sets of data values. In at least some embodiments, a scale mark is provided which provides a visual indication of a scale represented in a chart. When the chart is rescaled, the scale mark is repositioned to indicate a change in scale. Thus, a scale mark can be dynamically repositioned to visually indicate different chart scales.