Data values for various items are visualized in real-time or near real-time using radial-based techniques to produce data visualizations bearing some resemblance to, for example, pie charts, radial charts, etc. The data values are shown using indicators that encircle, or at least partially encircle, a central point. One or more characteristics of the indicator reflect the value that corresponds to the indicator. The characteristics may include, for instance, the color of the indicator and/or the distance of the indicator (or more specifically, a given point on the indicator) from the central point. The characteristics of the indicators change over time, in accordance with changes in the current values of the data items. A variety of indicators may be used, including, without limitation, points, icons, pie “wedges,” filled or partially-filled sectors of an ellipse or semi-circle, arcs or lines that span between the sides of such sectors, and so forth.