100% agree with the idea here, but I think what might help further is the option to scale the x-axis to a wider time frame and keep the y-axis minimum at 0 watts and only scale y max based on actual ride data within time window. I've used this identical type of graph on non-Garmin devices and know that viewing a 5, 20 and even 60 minute window of time helps with utility of y-axis scaling as well as getting more useful information from the graph about your power and HR performance. Garmin, please consider some sort of enhancement here. This is a great data field with a lot more potential.