"The current model does not deal with extreme volatility well. Mempool variations and price volatility create situations where the UTXOracle price can temporarily vary from the centralized exchange price by more than 10%. While this can likely be improved upon with a more comprehensive model it does highlight a potential serious limitation of the practical use of the model."

https://bitcoinmagazine.com/technical/utxoracle-model-could-bring-use-cases-to-bitcoin