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If the y axis values are same then the lines are not visible on the chart and the labels are also not visible on the chart. Can you draw the lines on the middle of the chart to get more visible?

async initTrack() {
  const { wasmContext, sciChartSurface } = await SciChartSurface.create(
    "chart" + this.element
  );
  sciChartSurface.xAxes.add(
    new NumericAxis(wasmContext, { axisAlignment: EAxisAlignment.Top })
  );
  sciChartSurface.yAxes.add(
    new NumericAxis(wasmContext, {
      axisAlignment: EAxisAlignment.Left
    })
  );

  const dataSeries = new XyDataSeries(wasmContext);
  for (let i = 0; i <= 1000; i++) {
    dataSeries.append(i, 10);
  }

  const rendSeries = new FastLineRenderableSeries(wasmContext, {
    dataSeries: dataSeries,
    strokeThickness: 1,
    stroke: "red"
  });
  sciChartSurface.renderableSeries.add(rendSeries);
  sciChartSurface.chartModifiers.add(cursorModifier);

  return { wasmContext, sciChartSurface };
}
Version
1.2.1431
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1
0

The issue is resolved in v1.2.1451

The problem happened for FastLineRenderableSeries with related dataSeries having the same yValues for each datapoint.

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