The data source for your Coach Rating is the Global ELO Coach Rating taken from the Danish Global Ranking System: https://bloodbowl.dk/coach-rating/.
The Qualifying Period is the calendar year prior to the Eurobowl being selected for. For example, 2025 is the Qualifying Period for the 2026 Eurobowl.
Each Qualifying Period starts on the 1st January and ends on 31st December. Each coach’s Global ELO Coach Rating will be taken from the first Global ELO update following the end of March, June, September and December and the average of these four values will determine the coach’s qualifying score.