Existing aggregate functions are not always useful in a real-time dashboard. Take for example a dashboard that wants to track current speed of a connected car, or current call queue in a call-centre...
for now, seems this can be done only using the q&a feature like "show speed by measuredate last 10 minutes as line chart" Definitly need this function to enhance displayed value, for example display on a gauge the min, max, avg, and current value (in this example, min, max, and avg would be calculated by stream analytics using sliding windows of for example 1h)
