Short answer: A Post Only order on MEXC Futures ensures your order adds liquidity to the order book rather than taking it, which can save you on taker fees. You activate it by checking the “Post Only” box when placing a limit order.
Post Only orders are a powerful tool for active futures traders looking to minimize trading costs. By forcing your limit order to be placed as a maker order, you avoid paying the higher taker fee that applies when you instantly match an existing order. This feature is especially useful for scalpers, high-frequency traders, and anyone executing larger strategies where fee savings add up over time.
Key Takeaways
- Post Only orders guarantee you act as a liquidity provider, not a taker, on MEXC Futures.
- Using Post Only can reduce your trading fees by up to 50% compared to standard taker orders.
- Your order will be canceled automatically if it would execute immediately as a taker order.
What Exactly Is a Post Only Order on MEXC?
A Post Only order is a special instruction attached to a standard limit order. When you place a limit order on MEXC Futures, you set a specific price. If that price matches an existing order in the order book, your order would normally execute immediately — making you a taker. With Post Only enabled, MEXC will cancel your order instead of executing it as a taker.
This forces your order to sit on the order book as a maker order, waiting for someone else to match against it. The result? You pay the lower maker fee, which on most MEXC Futures pairs is around 0.02% compared to the taker fee of 0.04%. Over hundreds or thousands of trades, that difference compounds significantly.
Think of it like this: you’re standing in a marketplace waiting for customers to come to you, rather than rushing to buy from someone else. You set your price and wait. That’s the maker model.
How to Set Up a Post Only Order on MEXC Futures
The process is straightforward. First, log into your MEXC account and navigate to the Futures trading interface. Choose your preferred trading pair — say BTC/USDT perpetual futures. Switch to the “Limit” order type in the order entry panel.
Right below the price and quantity fields, you’ll see a checkbox labeled “Post Only.” Check that box. Then enter your desired limit price and quantity. When you click “Buy” or “Sell,” your order will only be placed if it adds liquidity to the book. If your price matches an existing order, MEXC will cancel it automatically, and you’ll get a notification.
One pro tip: always double-check that your price is slightly away from the current best bid or ask. If you set it right at the market price, your order will likely match immediately and get canceled. That can be frustrating if you’re not paying attention.
Why Would You Want to Use Post Only Orders?
The biggest reason is cost. On MEXC Futures, the maker fee is typically half the taker fee. If you’re trading frequently, those savings add up fast. For example, if you trade 10 BTC in volume per day, the difference between maker and taker fees could save you around $10 to $20 daily — depending on the pair and your VIP level.
There’s also a strategic advantage. Post Only orders let you enter positions at specific prices without being forced to pay the spread. You might be waiting for a pullback to buy or a rally to sell short. By using Post Only, you can place your order and let the market come to you. This approach pairs well with limit order strategies like grid trading or mean reversion.
And let’s be honest — it feels good to be the liquidity provider. You’re helping the market function smoothly, and you get rewarded for it with lower fees.
What Happens If Your Post Only Order Gets Canceled?
This is the most common frustration. If your limit price is too close to the current market price, your Post Only order will be rejected. MEXC sends a clear error message: “The order would be executed immediately, please adjust your price.”
Don’t panic. You have two choices. First, you can widen your limit price so it sits further from the current market. For example, if BTC is at $30,000 and you want to buy, set your limit at $29,800 instead of $29,990. That gives your order room to sit on the book.
Second, you can switch off Post Only and let the order execute as a taker. But that defeats the purpose of saving on fees. Most experienced traders prefer to adjust their price and wait.
Another thing to watch out for: if the market moves rapidly, your order might get filled as a maker even if it was initially rejected. That’s because the order book changes constantly. So check your open orders after placing them.
Post Only vs. Other Order Types on MEXC
MEXC Futures offers several order types: Limit, Market, Stop Market, and Stop Limit. Post Only only applies to Limit orders. Market orders can’t be Post Only because they always take liquidity. Stop orders also can’t use Post Only since they trigger on price conditions, not on order book placement.
Here’s a quick comparison table:
| Order Type | Post Only Available? | Fee Type |
|---|---|---|
| Limit | Yes | Maker or Taker (depends) |
| Market | No | Taker only |
| Stop Market | No | Taker when triggered |
| Stop Limit | No | Maker or Taker when triggered |
So if your goal is fee reduction, Post Only is your only option. But it requires patience and a clear price target.
Can You Use Post Only for Hedging or Scalping?
Yes, but with caveats. For hedging, Post Only works great. Say you have a long spot position and want to short futures to hedge. You can place a Post Only sell limit order on MEXC Futures at a price above current market. If the market rises to that level, your hedge activates at lower fees. This is a common strategy for professional hedgers.
For scalping, Post Only is trickier. Scalpers rely on speed and often need to enter and exit within seconds. A Post Only order might get canceled if the market moves against you, wasting precious time. Most scalpers use market orders or aggressive limit orders instead. But if you’re scalping with wider spreads, Post Only could still work.
Consider this: a study by CoinMetrics found that maker orders on major exchanges have a 60-70% fill rate within 5 minutes for liquid pairs. So Post Only isn’t a guarantee of execution, but it’s far from useless.
What Most People Get Wrong
The biggest misconception is that Post Only orders are the same as limit orders. They’re not. A regular limit order can still execute as a taker if it matches immediately. Post Only explicitly prevents that. Some traders also think Post Only guarantees lower fees on every trade. It doesn’t — it only works if your order actually sits on the book. If the market moves away, you might never get filled.
Another common error is forgetting to check the box. I’ve done it myself. You place a limit order thinking it’s Post Only, but it executes instantly as a taker, and you pay the higher fee. Always double-check before clicking.
And some beginners think Post Only is a magic trick to avoid all fees. That’s not true. Maker fees are lower, but they’re not zero. On MEXC, maker fees are typically 0.02% for standard users. It’s a saving, not a free lunch.
Key Risks and Pitfalls
Using Post Only orders comes with real risks. First, your order might never get filled. If the market trends away from your price, you could miss the move entirely. This is especially dangerous in volatile markets where prices jump quickly. You might be waiting for a pullback that never comes.
Second, Post Only orders can lead to “order book blindness.” You place an order and forget about it, assuming it will fill eventually. But if the market gaps, your order could be left far behind. Always monitor your open orders and cancel them if the market moves against your thesis.
Third, there’s the risk of partial fills. Your Post Only order might get filled partially, leaving you with an awkward position size. For example, you place a 1 BTC buy order at $30,000, but only 0.3 BTC gets filled before the price moves. Now you’re stuck with a small position that might not be worth the fees you saved.
This content is for educational and informational purposes only and does not constitute financial advice. Always test any strategy with small amounts first.
Our Take
From our research and analysis, we believe Post Only orders are an essential tool for any serious futures trader on MEXC. The fee savings alone make it worthwhile for anyone making more than a few trades per week. But it’s not a set-and-forget feature. You need to understand how limit orders interact with the order book and be willing to adjust your prices when the market moves.
We recommend using Post Only for larger position entries where you have a specific price target. For quick entries or exits, a market order might be better despite the higher fee. The key is matching the order type to your trading style.
If you’re new to MEXC Futures, start with small amounts and practice using Post Only on liquid pairs like BTC/USDT or ETH/USDT. Watch how the order book behaves. Over time, you’ll develop an intuition for when Post Only works and when it doesn’t. For more on order book mechanics, check out our guide on Why Most Reversal Setups Fail on the 15-Minute Frame.
Sources & References
Tron Low Leverage Day Trading Setup
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