Hi  BOB,

With the values you indicate, I presume your efforts concerned a Line
Diagram

My suggestion here is to use an x-y Diagram, arranging your Data as
follows

A2..A6  =  a, b, c, d, e

B1..B7  =  0, 1, 2, 3, 4, 5, 10 ( 10 as your max y-Scale )

C1..C7  =  0, 0, 0, 0, 0, 0, 0

D2..D6  =  1, 2, 3, 4, 5

E1..E7  =   0,7 * B$7     (= 70%  max y-Scale)

F1..F7  =   0,9 * B$7     ( = 90% max y-Scale)

Make your Diagram on the base of the Range A1 : F7

Colour the lines 70%  /  90% in yellow / red without markers

Line Style thick or medium, so they remain visible when you

add the Grid-Lines.

Take 0 and 10 as well  for x-min and x-max values

To arrange the x-Axis as in a Line Diagram, Use an Add-in like

Chart Labeler   (www.appspro.com)     or

JWalk Chart Tools  ( http://j-walk.com/ss)

Apply the labels  A1.A7  to the dummy-values of column C

The original Scaling of the x-Axis is to be made white + not visible

Possibly, you have to format / move the labels so to achieve the

same "look" as for a Line Diagram.

I hope I didn't misunderstand you, unless you perhaps could  make use

of only some elements of such a procedure.

kind regards
Jean