Why doesn't a player have a form arrow?

A player has no form arrow when there is not enough recent data to judge their form. Two conditions must be met: the player must have finished rating calibration in that format, and they must have played at least 3 events in that format within the last 45 days.

Players who are still calibrating, or who played their games long ago (for example 5 games spread over several months), will not show an arrow until they play enough recent matches.

Form also refreshes with activity: only the last 5 events inside the 45-day window count, so an inactive player’s form disappears rather than showing stale information. Form is per format, a player can have a form arrow in 8x8 but none in 5x5 if they rarely play 5x5.