Vector series are created for values data groupings displayed in combo charts, by setting the Series Type to Vector.
Shape - controls the shape of the arrow head. Possible options are None, Arrow and Triangle.
Arrowhead Size - controls the width and height of the arrowhead in percentages of the vector width.
Min Arrowhead Size - controls the minimum width and height of the arrow head.
Max Arrowhead Size - controls the maximum width and height of the arrow head.
Vector series always support the Y1, Y2 and Label data point values. If the Combo Chart Subtype is set to XY Scatter, the series will also accept X1 and X2 data point values. Similarly when the Combo Chart Subtype is set to XYZ Scatter the series will also accept Z1 and Z2 data point values.