How to move marker along line based on cursor position?

[rickiesmooth]

I want to move a dot along lineY based on the cursor position, I'm able to move the ruler along the Y axis, but I'm unsure how to move the dot on the X axis.

Is there maybe a function to get the Y value based on the value of X (so in this case $point)?

vg.ruleX({ x: $point }),
vg.lineY(vg.from("stocks", { filterBy: query }), {
  x: "Date",
  y: "Open",
  stroke: "steelblue",
}),
vg.nearestX({ as: $point }),
vg.dot({ x: $point, fill: "steelblue" }),

[domoritz]

I didn't have time to build up an example but you could try to build a query that computes y based on the $point.

Something like

vg.Query.from("stocks")
  .select({ y: "Open" })
  .where($point.predicate())

[rickiesmooth]

thank you! I'll give that a try as well, for now I just used the built-in tooltip provided by plot