You may (or may not) have wondered how a bout fought in a fighter’s home country increases his chances of beating an opponent from a different country and how this can be associated to the rating system.
Wonder no more.
The rating advantage within the FightMatrix system is about a 1.5% advantage for the home fighter — not very significant.
In other words, relatively speaking, a fighter at home with approximately 98.5 points should be considered at “even odds” with a foreigner at 100 points.
This ratio may vary wildly on a country-to-country basis though. This is simply the worldwide average.