# Summary Widget Plugin Summary widgets can be used to provide visual indication of state based on telemetry data. They allow rules to be defined that can then be used to change the appearance of the summary widget element based on data. For example, a summary widget could be defined that is green when a temperature reading is between `0` and `100` centigrade, red when it's above `100`, and orange when it's below `0`. ## Installation ```js openmct.install(openmct.plugins.SummaryWidget()); ```