> For the complete documentation index, see [llms.txt](https://docs.tydro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tydro.com/vi.-security/security-overview/technical-security/price-feed-security.md).
# Price Feed Security
## Price feed security
Tydro prices every position from Chainlink, validates the feed before acting on it, and restricts protocol activity when a feed degrades. This page describes the price feed controls.
### Why this layer matters
The protocol acts on the prices it is given, to value collateral and to decide when a position can be liquidated. A wrong or stale price is a direct threat to solvency. Tydro treats price integrity as a security problem, not just a data feed.
### Current controls
* Validated source. Prices come from Chainlink, routed through the TydroOracle contract.
* Staleness checks. A feed that has stopped updating within its expected window is treated as stale.
* Deviation checks. The underlying Chainlink feeds carry deviation bounds.
* Restriction on bad data. If a price is stale or invalid, the PriceOracleSentinel restricts new borrows and liquidations until a valid price returns, and the Guardian can pause the affected market.
### On the roadmap
A multi-source redundancy layer that reads more than one independent provider and resolves disagreement between them is planned but not yet live. Until it ships, the protocol relies on Chainlink as its price source. See Oracle reliability.
For the residual risk these controls reduce, see [Price Feed Risk](/v.-risk/risk-types-and-overview/price-feed-risk.md).
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