Name: DU8-10c0 Datarun Ultimate
Rating: 4.8 (20 reviews)
Author: Joop_Verdoorn

This is a free datafield now! However, I don't develop this datafield anymore and I will not add any watches.
Source can be found at https://github.com/JoopVerdoorn? and at https://www.vermail.nl/datarun_code/
If you want a license key for an earlier version than 2.50, the spreadsheet with the calculation can also be found at https://www.vermail.nl/datarun_code/
  
See the manual for all the options: https://www.vermail.nl/datarun-ultimate/?page=1. This datafield comes with comes with additional copy versions, as explained in the manual.

Some examples of the metrics and functionality that is available:
- Pace averaged over the last 3 or 5 seconds
- Required pace to meet a certain finish time
- Speed averaged over the last 5 seconds
- Lap heartrate
- Last lap heartrate
- Average heartrate
- Running power (from the Stryd footpod for example)
- Power averaged over the last 3 seconds (also used for power alerts!)
- Lap power
- Last lap power
- Average power
- Altitude
- Estimated time of arrival (ETA)
- Deviation in time from a set finish time
- Background color and the backlight can be forced, regardless of system settings.
- Power workouts created with Finalsurge, Training Peaks, Sporttracks.mobi, including power alerts per workout step
- Power target and metrics can be adjusted based on temperature (also Tempe!), humidity and altitude.
- Lap efficiency index 
- Last lap efficiency index
- Average efficiency index
- Lap efficiency factor
- Last lap efficiency factor
- Average efficiency factor
- Current efficiency Index
- Current power to heartrate ratio 
- Lap power to heartrate ratio
- Last lap power to heartrate ratio 
- HR-zone and Tempe temperature (also for FR245m and FR645m)
- Powerzone 
- Power metrics in % of FTP
- Pace averaged over a custom period up to 300 seconds (5 minutes)
- Power averaged over a custom period up to 300 seconds (5 minutes)
- Colored labels

Code is available at https://www.vermail.nl/datarun_code/?C=N;O=A and may be used in anyway you like!