Marker Line not to start at 0

mas_h

Hi,

I have this wierd requirement.
From the 1st chart below, line A and B are drawn as marker line via scripting.
While line C was the line chart for secondary Y axis.
What I'm trying to achieve is to draw the red marker line (either using A or B ) that does NOT start from 0, but starts from x value marked by A, dynamically.

I did not find how NOT to start from 0 in A, and then I tried may be I can use a secondary axis, but looks like I'm also stuck there.

Eventually what I want is as in the 2nd image.
By the way, I'm using 2.2.1.
Thanks for any help/idea.

mas_h

sorry some typo..
"What I'm trying to achieve is to draw the red marker line (either using A or B ).."
supposed to be
"What I'm trying to achieve is to draw the red marker line (either using B or C ).."