I'm using PingPlotter 2 to plot the (horrid) performance of my ISP. Sometimes, the average ping I get is HORRIBLE for a couple hours at a time, and at those times I've wished there was an alert in PingPlotter that I could set to sound when the average ping fell BELOW a certain value instead of just ABOVE, that way I could have it running in the background, and it'd let me know when my internet-connection was usable again.
Since you've already got the code for checking averages ABOVE a certain value, this should be a quick fix, and should fall within the boundaries of what PingPlotter is normally used for. <img src="/forums/images/icons/smile.gif" alt="" />