Passing value from website Context Parameter to load context parameter

I am running a load test in Visual Studio and I wrote my own fetch rule to get some data from the screen and store it in a context parameter in a web test. Now I'm trying to take this value and copy it into a similar context parameter that's bound to loadtest so that I can use LoadTestPlugIn to output data from all tests. Getting data from loadtest into a web test seems simple, just not sure how to pass it in any other way.