Toggle Visibility on Line Series

I have a Line Graph with 2 series.  One is the actual value and one is the target value so someone can easily see how far off their target they are.

I want to be able to toggle the visibility of the Target series with a Boolean parameter.  It would be similar to setting a binding.

When Parameter A is true, set visibility of series A to true.  When Parameter A is false, set visibility of parameter A to false.

I am having trouble finding where I can add a binding on the visibility of my line series.  Is this possible?

Thanks,

Phillip