This data field shows the current cadence and draws a graph with recent values in the background.</p><p></p><p>- draws history, one pixel per second.</p><p>- configurable min, max, and threshold.</p><p>- three graph colors: below threshold, above threshold, above max.</p><p>- dedicated color palette for day and night mode.</p><p>- optimized battery consumption: keeps the graph in an offscreen bitmap to avoid full redraws (full redraws are 10x slower).</p>