Dynamic Reference Line Chart

[#1]

Dear,

i have define 5 expressions as a Group (cyclic) and two dimensions in chart, and its working fine, now i am going to define Reference line based on expression for example is given below:

exp1 is Gross login & reference line for Gross Login is 20

exp2 is Return & reference line for Return is 25

exp3 is Net login & reference line for Net Login is 30. and so on.

Problem is how i can define the reference line expression based on above expression, means if i select Gross login expression then reference line move on 20 or if i select Return expression then reference line move on 25 and so on.

Kindly guide me how i can define this.

Regards,

Zain.

[#2]

Thanks Dear to share application, i also did as same u did, and you are right Jonathan give a good solution to do the same work.

Regards,

Zain.