Dynamic measures are measures that can either appear or not appear on a chart based on whether the measure's splitting creates data within the chart's selected time frame. A Measure is split by Agent, application or a business transaction criterion. If a splitting value occurs for the Measure within the selected time frame, AppMon creates an entry for this Measure in the chart. Depending on the chart type, the entry can be either a line in a chart table or a series in a chart.
Have a look on the below link for the Dynamic Measure Matrix dashlet.