We calculated the margin for Grosvenor by analyzing the odds they offer and placed them into one of the following three categories:
From 1% to 5%: Good value
Over 5% to 7%: Average value
Over 7% to 10%: Poor value
We got our results by taking the "Match result" odds and also the over/under 2.5 goals odds for different matches in different football leagues. Getting the average results using this method, we were able to obtain the margins for each league and the overall betting margin for the bookmaker.
Grosvenor has an overall average margin of 5.56% for football and falls in the Average category. In the first section with Premier League and Championship, the margin is at 5.16%. The second section with Spanish La Liga and Italian Serie A, the margin is at 6.22%. Finally, taking the Australian, American and Brazilian Leagues into account, the margin is at 5.56%.