api.php?type=track&player= (player_name) [&time= (seconds)]
Gets the xp change within the last 'time' seconds. It's formatted like this:
(Time of earliest cml datapoint)
(xplatest[0]-xpearliest[0]),(ranklatest[0]-ranklatest[0]),xplatest[0],ranklatest[0]
(xplatest[1]-xpearliest[1]),(ranklatest[1]-ranklatest[1]),xplatest[1],ranklatest[1]
...