Hyperliquid activates ALO priority and expands IOC priority fees to 100% on mainnet.
DeFi & Yields ·
Hyperliquid has activated ALO priority and expanded the IOC priority-fee range to span 0–100% on its mainnet without introducing breaking API changes. ALO fees operate through a reordering mechanism applied at each priority level, allowing traders to adjust their positioning within the order queue based on fee contribution.
The update extends priority-fee functionality across both order types on mainnet infrastructure. IOC (immediate-or-cancel) orders now have access to the full spectrum of priority-fee options, enabling more granular control over execution priority. ALO (auction limit order) introduction adds a second priority mechanism to the platform's fee structure.
The specific mechanics of how ALO reordering interacts with existing fee tiers and the precise impact on order execution latency across different priority levels remain detailed in the protocol documentation. Whether this expansion affects fee revenue distribution or introduces changes to competing-order priority rules is not addressed in available announcements.