I learned this the hard way.
Price feeds are typically updated when the deviation exceeds a set threshold or when a certain heartbeat interval is reached.
Using the spot price from a single DEX pool as a price feed is risky: when the pool is small, a single large trade can skew the price.
$LINK is the token of the decentralized oracle Chainlink.
What else would you like to learn? Leave a comment and let me know.