Oracle staleness is hidden friction embedded in every trade on a perp DEX — it doesn't appear as a labeled fee, but it shows up as worse-than-expected entries, unexpected liquidations during volatile conditions, and mark price readings that don't match spot data. This episode explains the mechanism and the practical consequences at the trader level.

On a perp DEX, the oracle is not informational — it is the price. Every critical action references oracle data: opening a position, calculating mark price, triggering a liquidation, settling PnL. That makes oracle quality foundational. The episode covers three places staleness bites you (entry friction, mark price accuracy during an open position, liquidation delay and shortfall risk), why the problem is worse for the protocol than it appears (stale oracle events have caused material losses in p ...