Introduction
Use a post‑only order on Avalanche Futures when you want to earn the maker rebate without crossing the spread. This order type guarantees you pay the taker fee only if your order is immediately filled, otherwise it stays on the book and you receive a maker rebate.
Key Takeaways
- Post‑only orders protect you from paying the higher taker fee in thin markets.
- They are ideal for traders who prioritize fee efficiency over execution speed.
- The order will be cancelled if it would immediately match at a better price than the current best bid/ask.
- Avalanche Futures platforms typically publish a fee schedule that defines the maker rebate amount.
- Understanding the spread and liquidity is crucial before placing a post‑only order.
What Are Post‑Only Orders on Avalanche Futures
A post‑only order is a limit‑order variant that is designed to sit on the order book as a maker. According to Investopedia, a post‑only order “ensures the order will not be executed at a price that would cross the spread, thus qualifying for the maker rebate” (Investopedia, 2024). On Avalanche Futures, this means the order will be rejected if it would instantly become a taker, preserving the trader’s fee structure.
Why Post‑Only Orders Matter
Maker‑taker fee models drive a large portion of exchange revenue. The Bank for International Settlements notes that “electronic trading platforms increasingly use maker‑taker fees to improve liquidity provision” (BIS, 2022). By using post‑only orders, traders on Avalanche Futures can contribute to the order book depth without incurring the higher taker cost, thereby lowering net trading expenses and encouraging stable market conditions.
How Post‑Only Orders Work
The execution logic follows a clear decision tree:
- Submission: Trader places a limit price that is ≤ the current best bid (for a sell) or ≥ the current best ask (for a buy).
- Spread Check: The platform compares the order price to the top‑of‑book price.
- Outcome: If the order would cross the spread, it is rejected immediately. If it would not cross, the order is posted to the book.
- Fee Calculation: Once posted, the order earns a maker rebate equal to the fee rate multiplied by the notional value:
Maker Rebate = Fee Rate × Notional Value - Fill or Expiry: The order remains until it is filled, cancelled, or expires according to the trader’s time‑in‑force setting.
The effective spread after placing a post‑only order is therefore:
Effective Spread = (Best Ask − Best Bid) + (Maker Rebate / Notional) × 2
This formula shows that a successful post‑only placement can effectively tighten the market’s spread for the trader.
Used in Practice
Consider a trader expecting a short‑term dip in Avalanche (AVAX) futures while the market is thin. Instead of placing a market order that would incur a taker fee of 0.05 %, the trader submits a post‑only buy limit at the current bid price of $30.10. The order posts, earns a 0.02 % maker rebate, and waits for the market to move up, at which point the order fills and the net cost is lower than using a taker order.
Another scenario involves arbitrage between Avalanche sub‑net futures and the spot market. A trader uses a post‑only order to capture the spread without inadvertently moving the price against them, as the order will only execute if it does not cross the existing quotes.
Risks and Limitations
While post‑only orders protect against taker fees, they carry specific risks:
- No Fill Guarantee: In fast‑moving markets, the price may move away, leaving the order unfilled.
- Latency Sensitivity: High network latency on the Avalanche network can cause the spread check to be outdated, leading to unintended rejections.
- Fee Rebate Variability: Exchanges may change maker rebates, altering the cost‑benefit calculation.
- Partial Fill Exposure: Large orders that are partially filled still accrue maker fees only on the portion that remains on the book.
Post‑Only Orders vs. Other Order Types
Post‑Only vs. Standard Limit Order: A standard limit order may cross the spread if the market moves favorably, incurring a taker fee. A post‑only order will reject such a match, preserving the maker rebate but possibly missing an opportunistic fill.
Post‑Only vs. Market Order: Market orders guarantee execution at the best available price but always pay the taker fee, which can be significantly higher. Post‑only orders eliminate the taker fee at the cost of execution certainty.
What to Watch When Trading Post‑Only on Avalanche Futures
- Bid‑Ask Spread: Wider spreads make post‑only orders more attractive because the potential rebate offsets the opportunity cost.
- Fee Schedule: Keep an eye on any changes to maker/taker rates that affect the net cost.
- Order Book Depth: Low liquidity can cause post‑only orders to remain unfilled for extended periods.
- Network Congestion: Avalanche’s subnet congestion may delay order processing, influencing spread checks.
- Time‑In‑Force Settings: Choose appropriate expiry (e.g., GTC, IOC) to avoid holding stale orders in a rapidly moving market.
Frequently Asked Questions
Can a post‑only order be partially filled?
Yes, if a portion of the order matches against a resting order, the filled portion pays the taker fee while the remaining quantity continues to sit on the book as a maker and earns the rebate.
What happens if the market gaps up after I place a post‑only order?
The order remains unexecuted because it never crossed the spread at the moment of submission. It will stay on the book until the price returns to or beyond the limit price, or until it expires.
Do all Avalanche Futures exchanges support post‑only orders?
Most major decentralized and centralized exchanges that list Avalanche futures, such as Binance Futures and Bybit, offer the post‑only option. Always verify the specific order type in the platform’s trading interface.
How is the maker rebate calculated?
The rebate equals the maker fee rate (e.g., 0.02 %) multiplied by the notional value of the posted order. The exact rate varies by platform and can change over time.
Is a post‑only order suitable for high‑frequency trading?
It can be, provided the strategy seeks to earn rebates rather than capture fleeting price moves. High‑frequency traders must account for network latency and potential rejections if the spread narrows quickly.
Can I combine a post‑only order with other order types in a single algorithm?
Yes, many trading systems allow conditional logic where a post‑only order is used as the primary order while a market or immediate‑or‑cancel order acts as a fallback if the post‑only order is rejected.
Mike Rodriguez 作者
Crypto交易员 | 技术分析专家 | 社区KOL
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