Oracle vs Peg/De-Pegging

A third-party service that feeds real-world data — such as asset prices, weather events, or sports results — into smart contracts, enabling blockchain applications to respond to information that exists off-chain.

A peg is a mechanism that maintains a cryptocurrency's price at a fixed target value, typically one US dollar. De-pegging occurs when market forces or design failures cause the price to deviate significantly from that target.