Sources earn their weight.
No source is trusted on reputation. Each is scored against real outcomes, market by market, and one that cannot beat the category average is dropped to zero weight rather than quietly averaged in. Agreement is not evidence — five forecasters can be wrong together.
Probabilities are built from measured error: the uncertainty on a market is sized from how far its projections actually land from the result.
A model for this track, on this surface.
Every race is modelled on the history of that track and surface — a dirt sprint is not scored on turf routes run somewhere else. The model learns finish order directly, ranking a field rather than rating horses in isolation, and reads form as it stood on race day.
Exotics are priced off the whole field, correcting for the fact that a horse’s chance of running second is not simply its chance of winning — skipping that step is what makes naive exotic prices look better than they are.