This Watch Face shows on the main display:

1st area: current heart rate
2nd area: heart rate as graph of the last hour
3rd area: time / steps / alarm icon
4th area: connection icon + current date

rounded display: battery value in % 

Watch face will be update over the time.

Any suggestions are welcome anytime.

The image show 3 letters of weekday - this isn't correct.

V1.01: setting range for heart rate diagram from 50 to 200
V1.07: hide seconds, steps & heart beats (value & diagram) in low power mode