66% prediction accuracy
I have been building a football prediction model, it covers 20 leagues in Europe. It's built using approx 20 seasons worth of data for most of the leagues. Metric coverage is patchy at points, particularly in the earlier seasons but in total I have approx 350 million data points.
I have got it to a point where it is 66% plus accurate in its predictions. I'm fairly confident i can push this up to 70%. That is currently the rate when run indiscriminately against all fixtures but I plan on filtering it further as some analysis indicators produce much higher accuracy rates.
However, I understand all of the above is meaningless unless I can establish that the odds offered on the games were such that a profit could be generated.
Does anybody know an accurate historical odds database that I can pull from that would allow me to get exact profit/loss figures for the model?
Any advice appreciated.