Hi
Certain leagues and competitions may not be categorised by Betfair to a specific country and the Search Internationally option helps to find these markets. Here is a related forum post
https://community.welldonesoft.com/marketfeeder-suggestions/europa-league/msg32916/#msg32916From experience and from other people's posts, Market Locator works best if you use conditions to remove the markets you are not interested in, leaving you with the markets you wish to trade.
My suggestion is you can develop a Market Locator Template (.mfl file) that as you add the search conditions, you can save the template and run it again, and then add more conditions, and save it again until you are happy with the markets it finds.
So yes, I was saying to try initially a search internationally only
choose some markets from the sports column you are interested in e.g. match odds, OU 2.5
limit the days ahead so you can comfortably work with some current markets while developing your search
save the template
run the search
you will see some markets in the results you are not interested in, put in a condition to remove those, save template and run again
and keep doing this until your template is exactly how you want it.
When your template is perfect, you can adjust the days ahead etc. to what you want for trading and save again.
You can then also use this template with the Scheduler to automatically search for markets every few hours etc.