We're using Introscope 9.5.2 currently and I have 2 metric groups. 1 shows the number of pending transactions to be processed and another that shows the number of transactions processed in the last interval. I'd like to generate an alert if the number of transactions processed in the interval is 0 and the number of pending transactions is > 10. I don't see a way to compare the values of 2 different metric groups. Am I missing something?