Someone asked about this, so let me mention it while we're at it. Who writes price feeds onto the chain? Actually, push-based price feeds are generally updated when the price deviates beyond a set threshold or when a fixed heartbeat interval is reached. The advantage of push-based feeds is that smart contracts can read them at any time; the trade-off is that the oracle network has to keep paying gas to push updates, so the update frequency can't be increased arbitrarily. $PYTH and $LINK are the tokens of the oracle networks Pyth and Chainlink, respectively. Have you bookmarked this?

#PYTH