If you’ve ever watched your limit order get snapped up and turned into a market order before you even blinked, you know the pain. That’s where the post-only order comes in. It’s a simple but powerful tool that ensures you’re always the liquidity provider, not the taker. This guide walks you through exactly how to use a post-only order on KuCoin Futures, why you’d want to, and the trade-offs you need to know.
Why Use a Post-Only Order?
Post-only orders are designed for traders who want to add liquidity to the order book. On KuCoin Futures, makers (those who place limit orders that sit on the book) pay lower fees than takers. In fact, maker fees can be as low as 0.02%, while taker fees hit 0.06%. That’s a 3x difference. So if you’re placing a limit order and it gets filled immediately, you’re actually acting as a taker and paying the higher fee. A post-only order prevents that—it cancels the order if it would be filled instantly, ensuring you always get the maker fee discount.
Beyond fees, post-only orders help you avoid slippage. When your order sits on the book, you’re setting the price you want, not chasing the market. This is especially useful in low-liquidity pairs or during volatile moves. can help you navigate these scenarios more effectively.
At a Glance
| Feature | Post-Only Order | Standard Limit Order |
|---|---|---|
| Fee Type | Always maker (low fee) | Maker or taker (depends on fill speed) |
| Order Cancellation | Auto-cancels if immediate fill | Stays on book or fills immediately |
| Best For | Adding liquidity, fee reduction | Quick entries, aggressive fills |
| Risk of Slippage | Low (you set the price) | Higher if filled as taker |
| Guaranteed Fill | No (cancels if would fill) | Possible (if price hits) |
Post-Only Order Deep Dive
A post-only order is a variation of a limit order. When you submit it, the KuCoin Futures engine checks whether your order would match with an existing order on the book. If it would, the order is immediately canceled—it never gets placed. You get a notification saying “Post-only order would be filled immediately; order canceled.” This means you never accidentally take liquidity.
To set it up, go to the Futures trading page, select Limit order, then check the “Post Only” box. You’ll see it near the order entry panel.
- ✅ Strengths: Saves you 0.04% per trade on fees. Reduces slippage. Perfect for scalping and range trading where you want to stay in the order book.
- ⚠️ Limitations: Your order might never fill if the market moves away. Not suitable for fast entries or breakouts. Requires patience and a clear price level.
Experienced traders use post-only orders to build positions gradually. For example, if you want to short BTC at $30,000 but the current price is $29,800, you set a post-only limit sell at $30,000. If the price jumps to $30,000 and your order would fill instantly, it gets canceled—you avoid being the taker. You then adjust your price slightly higher. This discipline keeps your costs low.
Standard Limit Order Deep Dive
A standard limit order is the default on KuCoin Futures. You set a price and quantity, and the order sits on the book until it’s filled or canceled. But here’s the catch: if the market price reaches your limit, your order may execute as a taker if it matches immediately with an existing order. That means you pay the higher taker fee.
Think of it this way: a standard limit order can act like a market order if the price crosses your limit level. For high-speed traders, this is fine. But for cost-conscious traders, it’s a hidden expense. Drift Protocol Solana Perpetual Trading Review often recommend using post-only for longer-term positions and standard limit orders for quick entries.
- ✅ Strengths: Guarantees a fill if the price hits your level. Simple to use. Good for aggressive entries and stop-loss orders.
- ⚠️ Limitations: Can unexpectedly execute as a taker. Higher fees. More slippage risk in fast markets.
Standard limit orders are great when you need to get in or out fast. Say you’re trading a high-volatility altcoin and want to catch a breakout. A post-only order would cancel, missing the move. A standard limit order might get you filled, but you’ll pay the taker fee. It’s a trade-off.
Head-to-Head
Let’s put them in real scenarios.
Scenario 1: You’re scalping 1-minute candles on BTC/USDT. You want to buy at $29,500 and sell at $29,550. Use post-only for the entry. Place your buy limit at $29,500 with post-only checked. If it sits, you get the maker fee. For the exit, use a standard limit order to ensure you catch the quick profit. The difference in fees could save you $2 per trade on a 0.1 BTC position.
Scenario 2: You’re hedging a large position. You need to place a sell order at $28,000 to protect against a drop. Speed matters. Use a standard limit order. If the market crashes to $28,000, you want the fill immediately, even if it means taker fees. Post-only would cancel and leave you exposed.
Scenario 3: You’re building a long-term position in ETH. You want to accumulate 10 ETH at $1,800 over a week. Use post-only limit orders. Place them at $1,795, $1,790, $1,785. Each time the price dips, your order sits as a maker. If the market bounces, your order stays unfilled—no loss. You save on fees and avoid chasing the price.
Which Should You Choose?
This isn’t about one being better—it’s about matching the tool to your strategy. If you’re a patient trader who values low costs and doesn’t mind waiting, post-only is your friend. If you need speed and certainty, standard limit orders are the way to go.
Here’s a simple rule: use post-only for entries when you have time, use standard limit orders for exits and emergencies. That alone can cut your trading costs by 30-50% over a month. But remember, no strategy guarantees profit. Markets can gap, orders can slip, and fees are just one piece of the puzzle.
For more on optimizing your order types, check out .
Risks and Considerations
Post-only orders aren’t a magic bullet. They can lead to missed opportunities. If the market moves quickly, your order might never get placed, and you watch the trade pass you by. This is especially painful during high-impact news events or sudden volatility spikes.
Another risk: over-reliance on fee savings. Saving 0.04% per trade is great, but if you’re missing 10% moves because your order keeps canceling, you’re losing far more than you save. Always consider the opportunity cost.
Also, be aware that KuCoin Futures may adjust fee structures. Always check the current maker-taker schedule on their website. And never assume a post-only order will protect you from liquidation—it’s a tool for order placement, not risk management.
This content is for educational and informational purposes only and does not constitute financial advice. Futures trading carries substantial risk. You could lose more than your initial margin.
Sources & References
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