I've installed the Quirk Search Status. One option is there to check the Backward Link.
What is Backward link? Conditions are by 'Page', 'Page external Only', 'Domain', 'Domain External only' - please describe?
I think you mean Backlink, there are a couple of types, Do and No follow, the latter means it is a one way link, the do-follow is a 2 way link, when done properly a do-follow can be classed as a quality link.