Use 1: spotting unsustainable runs
When a team is collecting far more points than its cumulative xG suggests, there are two possibilities: it is exceptional at finishing, or it is riding a hot streak. The second is far more common. That team tends to be overpriced by a market that reads the table instead of the quality of the chances.
Use 2: fighting the goals line
The combined xG of both sides, split by home and away, is a natural entry point into the over/under market. Two teams that create and concede a lot push the line upwards, and sometimes the bookmaker is slow to reflect it if the recent scorelines were low.
Use 3: reading a managerial change
xG reacts before results do. A team that has just changed coach can keep losing while its chance creation has already improved. That leaves a short window in which the price still reflects the past and the football has already changed.
Mistake 1: looking at the xG of a single match
Over ninety minutes, noise rules. A missed penalty, a rebound, an early red card: any of those distorts the number. One match of xG is an anecdote; fifteen is a trend. Nobody should be betting on last weekend's xG.
Mistake 2: using it without looking at the price
The most expensive mistake and the most common. Finding the best team by xG is useless if the market already knows and has priced it in. The question is not who plays better, it is whether the price pays more than the probability justifies.
Where we publish it
Our free predictions use xG among other variables and go out with a minimum price, so the comparison is against a number rather than a feeling. The track record stays public, win or lose.