Strength of schedule is calculated from the opponents projected fantasy points allowed for the PK position. The best rating is +16 which gives the player the advantage against the defense and indicates an easy opponent, the worst rating is -16 which gives the defense the advantage and indicates a tough opponent.
[Graham hit on 31-of-38 attempts for Houston last year and now he is the man in Cleveland. The Browns may not be the Patriots but their offense is improving, so Graham should have a decent number of scoring opportunities most weeks. Graham is also a big asset from long range. Of his 31 made field goals last season, nine were from 50+ yards. ]