Who's closing line do i use?

[the shadow]

Let's say i have 5 sportsbooks accounts. I want to compare my wager to the closing line to see if i got value. Should i take an average of all the books to calculate the closing line or use the closing line at the book where the wager was made? Or perhaps some other method.
Thanks for the input!

[PRC]

Pinny's no-vig line

[FreeFall]

why not average all three?

[MadTiger]

Pinny's no-vig line

I was thinking this when I read the thread title. A Pinnacle line is the industry standard, known to be usually highly accurate.

why not average all three?

You would be diluting the Pinnacle line arbitrarily.