Assembly: Microsoft.Office.Interop.Excel (in microsoft.office.interop.excel.dll)
High-low lines connect the highest point with the lowest point in every category in the chart group. Only 2-D line groups can have high-low lines. This object isn’t a collection. There’s no object that represents a single high-low line; you either have high-low lines turned on for all points in a chart group or you have them turned off.
Use the HiLoLines property to return the HiLoLines object.