Function findCandlestickAtPointer

src/core/createRenderCoordinator.ts:2440–2472

(
    series: ResolvedChartGPUOptions['series'],
    gridX: number,
    gridY: number,
    interactionScales: NonNullable<ReturnType<typeof computeInteractionScalesGridCssPx>>
  )

  // Helper: Find candlestick match at pointer position (hoisted to avoid closure allocation)
  const findCandlestickAtPointer = (
    series: ResolvedChartGPUOptions['series'],
    gridX: number,
    gridY: number,
    interactionScales: NonNullable<ReturnType<typeof computeInteractionScalesGridCssPx>>
  ): { params: TooltipParams; match: { point: OHLCDataPoint }; seriesIndex: number } | null => {
    for (let i = series.length - 1; i >= 0; i--) {
      const s = series[i];
      if (s.type !== 'candlestick') continue;

      const cs = s as ResolvedCandlestickSeriesConfig;
      const barWidthClip = computeCandlestickBodyWidthRange(
        cs,
        cs.data,
        interactionScales.xScale,
        interactionScales.plotWidthCss
      );

      const m = findCandlestick(
        [cs],
        gridX,
        gridY,
        interactionScales.xScale,
        interactionScales.yScale,
        barWidthClip
      );
      if (!m) continue;

      const params = buildCandlestickTooltipParams(i, m.dataIndex, m.point);
      return { params, match: { point: m.point }, seriesIndex: i };
    }
    return null;
  };

  const onMouseMove = (payload: ChartGPUEventPayload): void => {
    pointerState = {