#TVSeries.Series.myRating
#TVSeries.Episode.myRating
I thought most skins would already have this...I guess your one does not otherwise you wouldn't ask.
Take a look at TVSeries.SkinSettings.xml in DefaultWide skin. It has a reference to the *.myRating DB field.
If you want to push it to skin without formatting rules then use the following properties:
Code:#TVSeries.Series.myRating #TVSeries.Episode.myRating