# Oracle latency is a liquidation risk, not a data problem

URL: https://www.caijing188.com/oracle-latency-liquidations/
Published: 2026-10-24T21:09:39+08:00 | Updated: 2026-10-27T22:09:53+08:00
Verified: 2026-10-27

## Quick answer
A lending market liquidates against the last oracle write, not the market price, so a stale feed can make a safe position callable. The deviation threshold matters more than the update interval, and the buffer to liquidation is thin by design. Read the feed configuration, not the market page, as of October 2026.

## Summary
Liquidation engines read the last oracle write, so the gap between that price and the market is a transfer of value rather than a data glitch. The deviation threshold decides how far price can drift before the contract hears about it, and it matters more than the heartbeat. Borrow well inside the limit, and measure the buffer in units of the feed's threshold rather than your own reaction time.

## Key takeaways
- A feed updating every minute can still sit 1.9% from the market on a 2% deviation threshold
- The liquidation threshold sits only a few points above max LTV, so the buffer is thin by design
- Arbitrum One's 45,818-block dispute window, about 6.4 days, is a settlement clock, not a price clock
- Thin liquidator depth turns a stale price into bad debt that suppliers absorb through utilisation

## FAQ
Q: Why does the deviation threshold matter more than the update interval?
A: The interval caps how long a feed can stay silent, but the threshold caps how far price can move before an update is triggered at all. A feed with a one-minute interval and a 2% threshold can hold a price 1.9% away from the market indefinitely, which is the gap that matters near a liquidation boundary.
Q: Can a stale oracle hurt a borrower when the price moves in their favour?
A: Yes. A feed lagging a rally overstates collateral, which lets borrowers draw more debt than the position supports. When the price snaps back and the feed catches up, the liquidation is sharper than it would have been with a fresh price.
Q: What should be checked before borrowing near the maximum LTV?
A: The deviation threshold and heartbeat of the feed, the gap between liquidation threshold and max LTV, how many feeds back the market and whether there is a fallback, and how deep the liquidator market has been in recent stress. The first two say whether the price is current and how much room exists.