Trading mechanics
GMX price impact vs slippage
4 min read · Fact-checked July 26, 2026 · gmxreferralcodes.com editorial team
On many exchanges, slippage is a broad label for the difference between quoted and executed price. GMX separates two mechanisms. For market orders, allowed slippage covers unfavorable price movement during execution. Net price impact reflects how position operations change long-versus-short open-interest balance.
That distinction matters because increasing the slippage setting does not remove price impact, and a trade can receive positive price impact when it improves market balance. This guide explains what the interface is showing and where each adjustment enters the result.
Key takeaways
- Allowed slippage applies to market orders; limit and trigger orders use a fixed acceptable price.
- Net price impact rewards or penalizes changes in open-interest balance.
- Fee balance incentives and price impact are related but separate calculations.
- Market-specific caps limit impact, and some excess negative close impact may become a delayed rebate.
- TWAP can help with large orders but introduces multiple execution events and completion risk.
What GMX calls slippage
A GMX market order is submitted and then executed by a keeper using valid signed oracle prices. Allowed slippage defines how much unfavorable price movement the market order accepts relative to its expected execution. The current default is 1%, the maximum is 5% and the interface warns above 2%.
Limit and trigger orders do not use that adjustable market-order setting. They use the fixed acceptable price established when the order is created. For a market order, setting slippage too high accepts a wider price range; setting it too low increases the chance of a revert.
Expected output already includes estimated fees and price impact. Allowed slippage adds a separate buffer for movement during processing; it is not an estimate of every trading cost.
Slippage and net price impact are separate
| Mechanism | What drives it | Where it applies |
|---|---|---|
| Allowed slippage | Price movement while a market order is processing | Acceptable price for market orders |
| Fixed acceptable price | Price selected when the order is created | Limit and trigger orders |
| Net price impact | Change in long/short open-interest imbalance | Stored across position operations and settled on decrease or close |
What net price impact means
Position price impact is based on the change in absolute imbalance between long and short open interest. An operation that reduces the imbalance can receive positive impact; one that increases it can receive negative impact. The calculation uses market-specific factors and caps.
GMX calculates price impact across opens and closes but applies the net result when a position is decreased or closed. The interface can display stored impact from entry, impact from closing and any claimable rebate. The chart's execution mark price does not necessarily include that separate collateral adjustment.
A simple balance example
Suppose a market has substantially more long open interest than short. Opening another long worsens the imbalance and can store negative impact. Opening a short moves the market toward balance and can store positive impact. GMX does not apply position impact at entry; it combines stored entry impact with the close-side calculation and settles the net result on decrease or close.
The 0.04% and 0.06% standard position-fee schedule follows a related balance incentive: the lower rate applies when an operation improves the absolute open-interest difference, while the higher rate applies when it worsens it. Fee and price-impact calculations are separate even though both respond to balance.
Caps, rebates and large orders
GMX caps positive and negative position impact per market. The current negative cap depends on liquidity depth, while the positive cap is lower for most markets. Market settings can change and should be checked in the live Monitor or order interface.
If a decrease order's negative net price impact exceeds the configured cap, the excess may become claimable as a rebate after the protocol's delay and review process. Large orders can still face material costs even with caps, and current capacity or open-interest limits may prevent execution.
When TWAP can help
A TWAP splits a large position change into smaller operations over time. If a single order would sharply worsen imbalance, staged execution may reduce net impact as market conditions update between parts.
TWAP adds operational trade-offs. Every part needs valid prices, liquidity and enough allocated execution fee, and the full sequence is not guaranteed to complete. Compare the estimated impact and fee of a single order with the risks of multiple executions before choosing it.
What to inspect before submitting
Open Execution details and review allowed slippage, stored price impact, estimated net impact, position fee and network fee together. The midpoint or mark price on a third-party tracker is not a guaranteed execution quote.
For the current spread and listed assets, the live prices page on this site joins GMX's official market, token and ticker endpoints. It is useful for orientation, while the final GMX confirmation remains authoritative for an actual order.
Primary sources
These sources were checked on July 26, 2026. Protocol parameters can change.
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Trade now with the codeFrequently asked questions
Are GMX slippage and price impact the same?
No. For market orders, allowed slippage limits unfavorable price movement during processing. Net price impact is a separate positive or negative adjustment based on open-interest imbalance. Limit and trigger orders use a fixed acceptable price.
Can GMX price impact be positive?
Yes. An operation that reduces long-versus-short open-interest imbalance can create positive impact. Entry impact is stored, then combined with close-side impact and settled as a net amount when the position is decreased or closed.
Does a higher slippage setting reduce price impact?
No. For a market order, it widens the unfavorable price movement the order accepts. Net price impact is calculated separately and is not removed by changing allowed slippage.
Why might a large GMX trade use TWAP?
Splitting the operation may reduce adverse imbalance impact. Each part still has execution fees and can fail because of prices, liquidity, leverage or fee conditions.
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