Hyperliquid Priority Fees: ALO Makers Pay for Queue Position, and Testnet Adds a 10 HYPE Gate

Hyperliquid priority fees just picked up four new rules on testnet. Per crypto.news, published October 18, accounts that want to pay IOC or ALO priority fees now need a minimum 10 HYPE delegated balance, and mempool priority is limited to accounts on Standard abstraction. No mainnet date has been announced.

This matters for anyone reading the Hyperliquid book. Priority fees decide which takers arrive first and which makers sit at the front of a price level. When the rules for buying that position change, the order in which liquidity appears and disappears changes with them.

How Hyperliquid Priority Fees Work Today

There are two kinds. Write priority applies to orders, read priority applies to data. The official Hyperliquid documentation says write priority only applies when every order in an action is IOC, or every order is a non reduce only ALO, on a non outcome asset. The fee is a fraction of notional, charged from the undelegated staking balance, converted to HYPE at the spot mark price and burned.

For IOC orders, the docs describe a linear effect from 0 to 8 basis points, with roughly 45 ms of latency reduction per basis point on mainnet. Above 8 bps the mempool time preference is the same, and orders at or above 8 bps are sorted by fee inside each 70 ms bucket. Cancels are prioritized ahead of any immediately executable order, paying or not.

For ALO orders, the fee does not touch mempool ordering at all. Orders at the same price are sorted by priority rate within a rolling 400 ms window, and the fee is deducted at placement whether the order fills or not. Read priority runs separately: two Dutch auctions on a three minute schedule, worth roughly 25 ms per slot on mainnet according to the same page.

The 10 HYPE Delegation Rule and the Other Testnet Changes

The crypto.news report lists four changes. The 10 HYPE delegated balance applies to accounts that want to use IOC and ALO priority fees, not to ordinary orders. At the $78.98 HYPE price quoted in the same piece, that is about $790 of stake.

The second change limits mempool priority to Standard abstraction accounts, the mode the docs recommend for market makers and high volume automated users, where spot and perp balances stay separate. The third lowers transaction priority for an account that does HyperCore activity other than placing, modifying or cancelling orders, until that activity confirms. The fourth gives lower mempool priority to accounts that submit CoreWriter operations directly, the bridge between HyperEVM contracts and HyperCore.

Crypto.news flags two gaps worth keeping in mind. The 10 HYPE threshold did not appear in the public documentation it reviewed, and the existing docs still say fees come from undelegated balance. Reading the docs today confirms the second point: the page describes undelegated balance and states no delegation threshold.

Who Actually Pays for Queue Position

The buyer base is small. A Blockworks Research report, Hyperliquid Priority Fees: Internalizing High Frequency Trading Revenue, dates the mainnet launch to April 13, 2026 and counts $5.07 million in cumulative priority revenue, split into $2.83 million from write priority and $2.24 million from read priority. Over its 30 day window, 347 wallets paid priority fees and the top 10 accounted for 69.4% of them.

The same report puts daily write priority users at about 194, against 89.7K daily active users. HIP-3 markets produced $1.06 million of write priority revenue in the period, about 61% of the write total. That points to the newer, thinner markets as the place where arriving first is worth the most.

Paying is not automatically profitable. In six high fee markets Blockworks measured, IOC cohorts kept $84K of $271K in gross returns after $187K of fees. ALO cohorts paid $78K in fees on $56K of gross returns, a net loss of $22K. Makers are currently overpaying for queue position as a group.

Quicknode's ORDER_PRIORITY dataset documentation describes the same pattern from the data side. Mainnet priority activity is mostly ALO, with raw rates between 1 and about 400, or up to roughly 0.04 bp, often placed as per user ladders competing for queue position. IOC priority orders are a smaller share.

What Changes in the Order Book

A paid ALO jumps ahead of same price quotes placed within the previous 400 ms, while older quotes keep their place. In practice the fight is over fresh quotes after a level clears or a price moves. The level you see is not always the queue you join, and a small resting order placed a few hundred milliseconds late can land behind a paying ladder at the same price.

The IOC side is about speed. With roughly 45 ms per basis point up to 8 bps, a taker paying full priority arrives meaningfully earlier than one paying nothing. Cancels still beat every executable order, which protects makers from being picked off by paid takers when they pull quotes first.

If the testnet rules reach mainnet, the population that can buy this position narrows to accounts with delegated HYPE and Standard abstraction that are not busy with other HyperCore or CoreWriter actions. That is a profile that fits dedicated trading accounts. Unified accounts and contract driven flow would compete on base priority only.

Reading Priority Driven Flow on the Tape

None of this shows up as a single print, but it leaves traces. Sudden one sided bursts of aggressive volume in the first moments after news are where IOC priority concentrates. Fast refills at the best bid or ask after a level is swept are where ALO ladders compete.

What to watch:

• Aggressor flow in the seconds after a level breaks. CVD that jumps in one step, with no follow through, often reflects a handful of fast takers rather than broad demand.
• Order book imbalance right after sweeps. A level that refills almost instantly on one side is being contested by makers, and the depth there can vanish just as fast.
• HIP-3 markets in particular, where Blockworks found most write priority revenue. Thin books make queue position worth more and reactions sharper.

Following Queue Competition on Buildix

The Buildix pair view puts CVD, order book imbalance and open interest for Hyperliquid markets on one screen, which is where a fast taker burst and an instant refill become visible as they happen. The screener ranks pairs on the same metrics, so the markets where the book is being contested hardest show up without watching each one.

The testnet changes do not alter what the book is. They change who gets to stand at the front of it, and a trader who knows that reads a refilled level with more caution.