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Thank you for sharing this because now I learned something. I have been asking myself where to find the odds for games that have been played. I assume this is only for the pre-game odds, but you can't look up odds for like halftime when team 1 was down 0-2 and they won it 3-2 and you would like to know what the odds were at that point?
I don't think there is such a thing, SP (starting price), bet is a standard in the industry, so they have an indicator for that,to grab the odds at half time, they would have to scan every bookie for every match at half time and archive that. I doubt there is anyone doing it, it would be a pain in the ass for sure as you will need to accurately know when half time actually is in a live bet.
I learned it the hard way, I have tried these multi bets a couple of times and combined all the major favourite teams, but I can't actually tell you if it ever worked out when I went for these fun multi bets with perhaps 7+ games. I think it didn't.
I did that in an experiment on favorites with low odds
https://bitcointalk.org/index.php?topic=5507810.0Total after all rounds and 327 games
- Individual bets balance +13.44
- Multiplier balance +2.58
Funny enough, two single multi wins, even at 1.5 odds, were enough to keep the balance positive.
But again, it's something like 4% over a year, so worse than interest rates even if you would keep that constant and not lose, and I think just one year could be simply a statistical anomaly.