Produce a column chart in the VanCharts chart maker with salesman as the category axis, product name as the series name, and sales volume as the series value as shown below:
Click Chart Attribute - Style > Coordinate Axis > Analytical Line and then the add button below Warning Line to add two warning lines with setting shown below:
User can add any number of warning lines if necessary..
We can know from above that the value of warning line supports equation, and line type, color, font, size and location can be set individually.
Note: Warning line is not available for pie, radar, Gantt charts, dashboard, map and other charts considering their features.
Save the template and click preview to see the effect above.