Name: PowerTimeline
Author: T.abe

A lightweight Edge 840 data field that displays power history as zone-colored bars with a heart rate line graph overlay.

PowerTimeline is a Connect IQ data field designed to visualize cycling power trends in a simple and easy-to-read timeline format.

The data field displays average power as zone-colored bar graphs and overlays heart rate as a red line graph. The rightmost bar represents the current average power, while past data shifts left over time.

Two timeline modes are available:

3 min mode: 18 bars using 10-second average power
9 min mode: 18 bars using 30-second average power

An FTP reference line is displayed on the graph, making it easy to see how current power compares to your FTP. Power zone colors are calculated from FTP, while the graph height can be adjusted separately using the Power graph max W setting.

For example, if Power graph max W is set to 300, the top of the graph represents 300 watts. Power above that level is clipped at the top of the graph, but the zone color still reflects the correct FTP-based intensity.

Heart rate is displayed as a red line graph, and its display range can be adjusted using the HR graph min and HR graph max settings.

For small data field layouts, the header text is automatically hidden to maximize graph height. For larger layouts, the header can be shown or hidden from the settings.

Features

Power timeline bar graph
Heart rate line graph overlay
FTP reference line
FTP-based power zone color display
Adjustable power graph scale in watts
3-minute timeline: 18 bars × 10-second average power
9-minute timeline: 18 bars × 30-second average power
White / Black background selection
FTP setting
Heart rate graph min / max settings
Header show / hide setting
Header is automatically hidden in small fields
Designed for Edge 840
No audio alerts

Power Zone Colors

L1: Gray
L2: Blue
L3: Green
L4: Yellow
L5: Orange
L6: Red
L7: Purple

Settings

FTP
Background: White / Black
Timeline: 3 min / 10 sec avg or 9 min / 30 sec avg
HR graph min
HR graph max
Header: Show / Hide
Power graph max W

Recommended Power graph max W examples

250W: Larger graph display for lower-power riders
300W: Standard default setting
400W or higher: Wider range for high-power efforts

Compatibility and display note

PowerTimeline is primarily designed around Edge 840 style layouts, but this version also supports additional Edge devices.

Because data field size and screen resolution differ by device, some layouts may look crowded. If this happens, set Header to Hide or reduce Value font size in the app settings.

For small fields, using Power only or reducing the value font size may improve readability.