Crosshair Follow
The rule stands under the pointer, and the dot rides the line itself to the nearest point rather than cutting between points.
Usage
Meant for
Examples
On a Card
Point at the chart, drag a finger along it, or tab to it and use the arrow keys. The rule stands exactly under the pointer — no easing on the line — while the dot rides the series itself through offset-path to the nearest point, so it is always on the curve and never cuts a corner, and the readout above it glides along. Leave and all three fade where they are. Until you reach for it, the preview walks the series on its own.
The class is wm wm-crosshair-follow — the first half is the marker the trigger and reduced-motion rules hook into, the second is the effect.