Orphaned Stake MonitorV11

Delegator detection: for each stake address we take the latest delegation transaction. If it points at a retired pool and the stake key has not since been deregistered, the address counts as orphaned.
Balance calculation: the sum of all unspent UTxOs, plus lifetime rewards from both the reward and reward_rest tables, minus withdrawals. Including reward_rest matters: it holds refunds, treasury and reserve payouts, and leaving it out makes any wallet that withdrew one of those look overdrawn.
Delegator counts: "All" counts every registered stake address still delegated. "Above 5" counts those holding more than 5 ADA, which filters out dust and empty wallets.
Dormancy: a delegator is called dormant when their most recent still-unspent output and their most recent withdrawal both predate their pool's retirement certificate. Active means activity within the last 90 days. A dormant wallet is likely abandoned. An active wallet whose owner simply has not redelegated is a very different case, and the difference is the point of the split.
Forgone rewards: an estimate, not a measurement. It is orphaned stake multiplied by the assumed annual return shown on this page, multiplied by epochs orphaned divided by 73 epochs per year. It assumes the stake sat orphaned for that whole period.
Trend history: snapshots begin with the first V11 refresher run. Nothing before that point exists or can be reconstructed, so the trend chart starts short and grows one point per epoch.
Refresh cycle: the heavy query runs on a schedule in the background and takes roughly 15 minutes. This page only ever reads the finished cache, so it always loads instantly.