xPoints/Expected Points – the number of points we would expect a driver to score in a race given how they ran as judged by ATP and ATP25. A full explanation of xPoints can be found here.
AFP/ASP – Average Finishing Position/Average Starting Position
DevFP/DevSP – Standard deviation of a driver’s finishing/starting position.
ATP/Average Track Position – the average running position of a driver on each lap they were racing, with their position taken once per lap at the start finish line. A full explanation of ATP can be found here.
ATP25 – a driver’s ATP for the last 25% of the race only.
PassEff/Pass Efficiency – shows the percentage of passes that are in a driver’s favor. Passes are measured by a change in position at the end of each lap, once per lap. Pit lane passes are included but passes that result from an engine failure or something similar that causes a driver to slow and retire are not counted against that driver.
RunPerc – the percentage of races a driver finishes running.
AFS/Average Fast Speed – the average rank of a driver’s fastest lap in a race. Ex: AvgFastSpeed of 2 means that on average, that driver has the second fastest race lap time.
Top5Perc – the percentage of a driver’s running laps that he is in the top five of the running order.
AEP/Average Extra Positions – the average number of places a driver gains above/below their expected finishing position, based on where they started the race.
StartRetention – the percentage of time a driver gains or holds their position on a race start, restart after a caution flag, or during a green flag pit cycle. Race starts are measured for the first two laps after and restarts for the first lap after. A green flag (GF) pit cycle is counted from when the first driver pits to when the last driver pits. A full explanation of green flag pitstop retention can be found here.
PM (plus-minus) – the number of spots a driver has gained or lost on race starts, green flag pit cycles, or restarts for the season (total).
PMperRestart/Start – the number of spots a driver gains or loses on average per race start, restart, or green flag pit cycle.