Add smoothing to the scatter plot
The scatter plot feature COULD be a lot more useful than it is, if you could compare trailing averages of metrics rather than the instantaneous values.
For example, let's say I want to chart power and/or cadence vs. heart rate. Unfortunately, power can fluctuate rapidly during a ride, and heart rate does not respond instantaneously to changes in power - it ramps up or down over time.
The idea would be to compare "trailing averages" for scatter plot data. i.e. plot 60 second trailing average power vs. heart rate. The length of the trailing average should be configurable on a slider, anywhere from 5 seconds to 5 minutes.