About this guide: I'm the writer behind supa.is. Between February and May 2026 I've published 150+ articles on supa.is across crypto and brokerage tooling — including 30+ Hyperliquid-specific guides (recent examples: Hyperliquid Limit Order Maker vs Taker Fees, Hyperliquid First Perp Trade Safely). The most-repeated reader question across that Hyperliquid archive is exactly how to choose between Market, Limit, Post-Only, IOC, and FOK orders, which is why I'm publishing this standardized guide instead of answering one-off.
On Hyperliquid, picking the wrong order type is the fastest way to turn a winning trade into a slippage-heavy loss. Unlike AMMs where you just swap tokens, Hyperliquid is a Central Limit Order Book (CLOB). It matches buyers and sellers directly, giving you granular control over execution. But that control only works if you understand the mechanics. For a comprehensive overview of the platform, check out our Hyperliquid Complete Guide.
In this guide, we will break down every order type available on Hyperliquid, explain when to use them, and show you how to navigate the Pro dropdown to avoid the most common execution mistakes.
1. Market Orders: Speed Over Price
A Market Order is the simplest way to enter or exit a position. When you place a market order, you are telling Hyperliquid to fill your trade immediately at the best available price in the order book.
If the top 5 asks for BTC-PERP are at $60,000, $60,001, $60,002, $60,003, and $60,005, a market order eats through all five levels until your position is filled. Your average fill will land somewhere between $60,000 and $60,005.
Use market orders when speed beats price: exiting a losing trade, chasing a breakout, or trading highly liquid assets where slippage is negligible.
The risk? Slippage.
The primary risk of market orders is slippage. If the order book is thin (low liquidity), your market order might have to climb significantly up the order book to find enough matching orders. For example, if you try to buy a low-cap altcoin with a market order, your average price could be 1% or 2% higher than the price you saw on the screen.Always check the order book depth before placing a large market order. If the top few levels only have a few thousand dollars of liquidity, a market order will cause severe price impact.
2. Limit Orders: Price Over Speed
A Limit Order is the opposite of a market order. With a limit order, you specify the exact price at which you are willing to buy or sell. The order will only be filled if the market reaches your specified price.
If BTC is at $60,000 and you want to buy at $59,500, you place a limit buy there. Your order sits as a bid. If the price drops to $59,500 or below, you get filled. If it only dips to $59,800 and bounces, you miss the trade.
Limit orders are the bread and butter of Hyperliquid trading. Use them when you have a specific entry/exit in mind, want to avoid overpaying on volatile assets, or want to provide liquidity (acting as a maker).
The risk? Missing the trade entirely.
The downside of limit orders is that the price might never reach your level. If you set a limit buy order too low, you might miss the bounce entirely. This requires patience and sometimes results in "paper trading" losses where you watch the price go up without your position.3. Post-Only Orders: The Maker's Best Friend
If you want to trade on Hyperliquid and pay the lowest possible fees, you need to understand Post-Only orders.
Hyperliquid charges a maker fee and a taker fee. Makers provide liquidity to the order book (they place limit orders that sit there waiting), while takers remove liquidity (they place orders that immediately match with existing orders).
A Post-Only order guarantees that your order will *only* be placed on the book as a maker. If your order would immediately cross the spread and get filled as a taker, the exchange cancels it instead.
Say BTC is at $60,000 (best bid $59,999, best ask $60,001). If you place a Post-Only buy at $60,000, it would cross the spread and fill as a taker. Hyperliquid cancels it instantly. But if you place it at $59,998, it sits as a maker, and you pay the lower maker fee.
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Sign up on Hyperliquid →Post-Only is essential for fee arbitrage (preventing accidental taker fills on tight spreads) and algorithmic trading (ensuring bots always classify as makers).
The risk? Never getting filled if the market moves too fast.
Because Post-Only orders are instantly canceled if they would cross the spread, you might find yourself constantly placing orders that get rejected. This is frustrating if you are trying to enter a fast-moving market.4. IOC Orders: Immediate or Cancel
IOC stands for Immediate or Cancel. This order type is designed to execute as much of your order as possible right now, and cancel the rest.Say the BTC book has $100k at $60,000 and $50k at $60,001. You place an IOC buy for $150k at $60,001. The exchange fills $100k at $60,000 and $50k at $60,001. The remaining $0 is canceled instantly. You don't leave a stale limit order on the book.
Use IOC when you want to aggressively enter a position without leaving a resting order, or when trading illiquid assets and you just want to grab whatever liquidity is available right now.
5. FOK Orders: Fill or Kill
FOK stands for Fill or Kill. This is the strictest order type. The entire order must be filled immediately, or the entire order is canceled.Same book: $100k at $60,000, $50k at $60,001. You place a FOK buy for $150k at $60,001. If there's only $140k total available, the exchange can't fill the *entire* order immediately. It cancels the whole thing.
FOK is rare for retail. It's primarily used by institutional traders filling large blocks without signaling their position, and arbitrage bots that need all-or-nothing execution across multiple exchanges.
6. Stop-Limit and Stop-Market Orders
Stop orders are triggered only when the price hits a certain threshold. They are crucial for risk management.
Stop-Market
A Stop-Market order becomes a market order once the stop price is hit. If you are long BTC at $60,000 and set a stop-market at $58,000, the moment BTC touches $58,000, your position is liquidated via a market order. This guarantees you exit, but you might experience slippage if the market is crashing fast.Stop-Limit
A Stop-Limit order becomes a limit order once the stop price is hit. If you set a stop-limit at $58,000 with a limit price of $57,900, the system will only sell your position at $57,900 or better. If the price crashes through $58,000 and $57,900 instantly, your order won't fill, and you'll be left holding the bag.Pro Tip: On Hyperliquid, stop-loss orders are evaluated based on the mark price, not the last trade price. This protects you from being liquidated by a brief, artificial spike in the last trade price (a "wicking" event). You can read more about how Hyperliquid calculates liquidation and mark prices in our Hyperliquid Liquidation Price & Maintenance Margin guide.
How to Use the Pro Dropdown to Avoid Chasing Orders
When you are trading fast, it's easy to click the wrong order type and end up "chasing" the market—paying a premium to enter a position right as it reverses. Hyperliquid's Pro interface gives you a dropdown menu to control exactly how your order behaves.
To avoid chasing orders:
- Open the Pro dropdown in the order panel.
- Select Post-Only if you want to ensure you are never filled as a taker. This prevents you from paying higher fees and guarantees you only enter at a price that adds liquidity.
- Use IOC if you want to grab available liquidity without leaving a stale order on the book. This is perfect for grabbing a quick fill without accidentally placing a limit order that sits there for hours.
- Avoid Market orders unless you are exiting a position. Market orders are the fastest way to chase a price and suffer slippage.
Order Type Comparison Table
| Order Type | Speed | Price Control | Best For |
|---|---|---|---|
| Market | Instant | None (accepts best available) | Exiting quickly, high liquidity assets |
| Limit | Slower (waits for price) | Exact price control | Entering positions, providing liquidity |
| Post-Only | Slower (waits for price) | Exact price control | Fee optimization, avoiding taker fees |
| IOC | Instant (partial fills) | Price control | Grabbing available liquidity without leaving orders |
| FOK | Instant (all or nothing) | Price control | Institutional block trades, arbitrage |
| Stop-Market | Instant (after trigger) | None (accepts best available) | Hard stop-losses, risk management |
| Stop-Limit | Slower (after trigger) | Exact price control | Controlled exits, avoiding slippage on stops |
How to Choose the Right Order Type
Choosing an order type isn't just about preference; it's about the market conditions and your trading strategy.
1. Are you trading a high-volume asset like BTC or ETH? If yes, market orders are generally safe. The order books for BTC-PERP and ETH-PERP are so deep that slippage is usually negligible unless you are moving millions of dollars. 2. Are you trading a low-volume altcoin? If yes, avoid market orders. The order book is thin, and you will suffer massive slippage. Use limit orders or Post-Only orders to ensure you get filled at a fair price. 3. Are you trying to save on fees? Hyperliquid's fee structure rewards makers. If you are not in a rush to enter a trade, always use limit orders. If you are worried your limit order will cross the spread and get filled as a taker, switch to Post-Only. You can view the exact fee tiers and structures on the official Hyperliquid fees page. 4. Are you trying to exit a losing trade? Use a Stop-Market order. It's better to take a slightly worse price and get out than to use a Stop-Limit and miss the exit entirely, leaving you with a much larger loss.Common Mistakes to Avoid
Mistake 1: Using Post-Only in a fast-moving market If you are trying to buy a breakout and the price is shooting up, a Post-Only order will constantly get canceled because it would cross the spread. You will watch the price go up while your orders are rejected. In a breakout, use a Market or Limit order. Mistake 2: Not understanding IOC vs FOK If you are an algorithmic trader and you use FOK on an illiquid asset, your bot will constantly fail to execute. FOK requires the entire order to be fillable immediately. If you want to take what you can get and cancel the rest, use IOC. Mistake 3: Confusing Stop-Limit with Stop-Market Many traders think a Stop-Limit is safer because it controls the price. In reality, in a crashing market, a Stop-Limit is the most dangerous order type. If the price gaps down, your limit order will sit there unfilled, and you will be left holding a position that is worth far less than your limit price.Conclusion
Hyperliquid's CLOB engine provides professional-grade order types that give you complete control over your trading execution. By understanding the nuances of Market, Limit, Post-Only, IOC, and FOK orders, you can optimize your entries, minimize slippage, and reduce your fee costs.
For most retail traders, mastering the Limit order and the Post-Only modifier will yield the biggest improvements in profitability. For risk management, always rely on Stop-Market orders to ensure you don't get stuck in a falling market.
If you are ready to start trading with these order types, you can Sign up on Hyperliquid and get a 4% fee discount on your first $25M in volume (excludes Vaults and sub-accounts).
Risk Warning
Risk Warning: Crypto trading involves substantial risk of loss. Never invest more than you can afford to lose. This is not financial advice.
FAQ
What is the difference between a market order and a limit order on Hyperliquid?
A market order executes immediately at the best available price, guaranteeing speed but not price. A limit order only executes at a specific price or better, guaranteeing price but not speed.How do I avoid slippage on Hyperliquid?
To avoid slippage, avoid using market orders on low-liquidity assets. Instead, use limit orders or Post-Only orders to ensure you are filled at the price you want. You can also check the order book depth before placing a large market order.What does Post-Only mean on Hyperliquid?
Post-Only means your order will only be placed on the order book as a maker. If your order would immediately cross the spread and get filled as a taker, the exchange will cancel it instead. This is useful for avoiding taker fees.Can I use stop-loss orders on Hyperliquid?
Yes, Hyperliquid supports Stop-Market and Stop-Limit orders. Stop-Market orders execute immediately as market orders once the stop price is hit, while Stop-Limit orders become limit orders once triggered.Which order type is best for fee optimization?
Limit orders and Post-Only orders are best for fee optimization because they classify you as a maker, which typically incurs lower fees than taker fees on Hyperliquid.Continue with Hyperliquid
Browse the Hyperliquid guide hub for the complete user journey.