About this guide: I'm Lawrence, 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 Order Book Depth & Slippage Analysis, 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.
When you trade on Hyperliquid, the difference between a profitable trade and a slippage-heavy loss often comes down to one thing: the order type you select.
Hyperliquid operates as a high-performance Central Limit Order Book (CLOB) decentralized exchange. Unlike automated market makers (AMMs) where you simply swap tokens at a calculated price, a CLOB matches buyers and sellers directly. This gives you immense control, but it also means you must understand the mechanics of order execution. 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 avoid the most common execution mistakes that cost traders money.
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.
How it works
If you want to buy Bitcoin (BTC-PERP) and the top 5 sell orders (asks) are at $60,000, $60,001, $60,002, $60,003, and $60,005, a market order will eat through all five levels until your entire position is filled. Your average fill price will be somewhere between $60,000 and $60,005.When to use it
Market orders are ideal when: * You need to exit a position immediately to stop a loss (stop-loss execution). * You are chasing a breakout and speed is more important than the exact entry price. * The asset is highly liquid, meaning the order book is thick and slippage will be minimal.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.
How it works
If BTC is trading at $60,000 and you want to buy at $59,500, you place a limit buy order at $59,500. Your order sits in the order book as a bid. If the price drops to $59,500 or below, your order is filled. If the price only drops to $59,800 and bounces back, your order remains unfilled.When to use it
Limit orders are the bread and butter of active trading on Hyperliquid. You should use them when: * You have a specific entry or exit price in mind. * You are trading volatile assets and want to avoid paying more than necessary. * You want to provide liquidity to the market (acting as a maker).The risk: Missing the trade
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).
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Sign up on Hyperliquid →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.
How it works
Let's say BTC is trading at $60,000. The best bid is $59,999, and the best ask is $60,001. If you place a Post-Only buy order at $60,000, it would immediately match with the $60,001 ask. Because Post-Only orders cannot be takers, Hyperliquid will cancel your order immediately. If you place a Post-Only buy order at $59,998, it will sit on the book as a maker, and you will pay the lower maker fee when it eventually gets filled.When to use it
Post-Only is essential for: * Fee arbitrage: If the spread is tight, a standard limit order might accidentally get filled as a taker, costing you more in fees. Post-Only prevents this. * Algorithmic trading: Trading bots often use Post-Only to ensure they are always classified as makers, optimizing their fee structure.The risk: Never getting filled
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.How it works
Imagine the BTC order book has $100,000 of sell orders at $60,000, and $50,000 of sell orders at $60,001. You place an IOC buy order for $150,000 at $60,001. The exchange will immediately fill $100,000 at $60,000 and $50,000 at $60,001. Because there is no more liquidity at or below $60,001, the remaining $0 of your order is instantly canceled. You do not leave a resting limit order on the book.When to use it
IOC is useful when: * You want to aggressively enter a position but don't want to leave a stale limit order on the book if the market moves away. * You are trading illiquid assets and want to grab whatever liquidity is currently available without committing to a future price.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.How it works
Using the same example as above: $100,000 of sell orders at $60,000, and $50,000 at $60,001. You place a FOK buy order for $150,000 at $60,001. Because the exchange cannot fill the *entire* $150,000 immediately (there is only $150,000 available, but let's say there was only $140,000 total), the order will not fill at all. It will be completely canceled.When to use it
FOK is rare in everyday retail trading. It is primarily used by: * Institutional traders who need to fill a large block order all at once to avoid partial fills that could signal their position to the market. * Arbitrage bots that need to execute a trade on multiple exchanges simultaneously. If one leg of the trade fails, the whole arbitrage fails, so FOK ensures all-or-nothing execution.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 might not fill, and you could end up holding a bag that goes to zero.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.
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.