Feature request: Power : Heart Rate data field

I would like you guys to ask for this very important feature to be included: Power to Heart rate (Pw:Hr). We are still missing it.

What is it: The relationship between power (Power in watts) and heart rate (Heart rate in beats per minute) is one of the most useful metrics in cycling. Power represents the work you put into the pedals (what you put into the pedals), and heart rate represents the body's response (how hard your body is working).