Match momentum measures the swing of the match and which team is creating more threatening situations at certain points in time. It does this by measuring the likelihood of the team in possession scoring within the next 10 seconds.

Match momentum is derived from another Stats Perform Qwinn model called possession value. Possession value measures the impact each individual event on the pitch has on changing the probability of team scoring within the next 10 seconds.

For example, carrying or passing the ball into dangerous areas around the opposition penalty box are valued much higher than passive possession around the halfway line. We can then aggregate these individual actions to the team level, allowing us to see which team had the more dangerous possessions.

これが見つけたmomentumのソースね