Before you rely on it

labelBasis=point_in_time labels each row with the cohort the wallet was in at that hour; current labels history with today's grading, which tells a backtest which wallets later became rankable. On Coin cohort metrics the size, tier and pnl_unrealized axes are always point-in-time and pnl_abs is always current. Coin metrics serves current only and refuses point_in_time by name. Every response declares its label_basis. Label basis has the detail.

A cohort matrix groups by one axis: size, pnl, pnl_abs, tier or pnl_unrealized. Each axis has its own ladder of labels; Cohort ladders publishes the exact strings ?cohort= accepts, so read them rather than hard-coding a bucket name. Cohorts and axes defines them.

On Coin metrics every row carries provisional. It is true on at most one row, the hour still in progress, whose ts changes on every poll. Drop it before you store a series.