Data.betfair.com: multiple market IDs?

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northbound
Posts: 79
Joined: Mon Mar 20, 2017 11:22 pm

Fri Aug 04, 2017 10:51 am

These data files contain a field called EVENT_ID, which is effectively the Betfair Market Id.

I noticed that all football Match Odds markets have entries with 2/3 different EVENT_ID values. This doesn't happen for Golf markets, where correctly there's only 1 EVENT_ID for a market.

My guess is that Betfair has different exchanges (Global, Italy, etc) so perhaps the same football match has a different EVENT_ID on different exchanges.

Question: is there a way to determine which EVENT_ID belongs to the global Betfair exchange?

northbound
Posts: 79
Joined: Mon Mar 20, 2017 11:22 pm

Fri Aug 18, 2017 12:09 pm

I haven't found a definitive way to tell which EVENT_ID belongs to the global Betfair exchange, so I used a workaround.

When there are entries for the same market (e.g. Juventus v Napoli > Correct Score) with 2+ different EVENT_IDs, I simply calculate the total traded volume for each EVENT_ID, then only keep entries for the one with the biggest traded volume.

Usually foreign Betfair exchanges (e.g. Italian) have a much lower traded volume.

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