# VOOI\_PRO:tradingFees

This page outlines the trading fee structure for perpetual DEXs and trading marketplaces currently supported on **VOOI Pro**: <https://pro.vooi.io>.

Trading fees are an essential part of how DeFi operates, compensating liquidity providers and ensuring healthy market balance. Each supported DEX and trading marketplace has its own fee model, while VOOI provides transparent access to these structures for better cost awareness.

Please note: all fees are determined by the respective DEX or trading protocol and are subject to change.

## Lighter

Trading fees apply **both when opening and closing positions** and vary dynamically with trading volume:

* **Maker:** 0 bps (0.00%) – adds liquidity and waits to be matched.
* **Taker:** 0 bps (0.00%) – executes immediately at market price.

For more details, refer to the [Lighter documentation](https://docs.lighter.xyz/perpetual-futures/fees).

## Aster

Trading fees apply **both when opening and closing positions** and vary dynamically with trading volume:

* **Maker:** 0 bps (0.00%) – adds liquidity and waits to be matched.
* **Taker:** 4 bps (0.04%) – executes immediately at market price.

For more details, refer to the [Aster documentation](https://docs.asterdex.com/product/aster-perpetual-pro/fees-and-specs/fees).

## Hyperliquid

Trading fees apply **both when opening and closing positions** and vary dynamically with trading volume:

* **Maker:** 0 – 1.5 bps – adds liquidity and waits to be matched.
* **Taker:** 0 – 4.5 bps – executes immediately at market price.

For more details, refer to the [Hyperliquid documentation](https://hyperliquid.gitbook.io/hyperliquid-docs/trading/fees).

## Orderly  <a href="#referral-rebates-for-orderly" id="referral-rebates-for-orderly"></a>

Trading fees are charged **both when opening and closing positions**, depending on the order type:

* **Maker:** 0 bps (0%) – adds liquidity and waits to be matched.
* **Taker:** 2.5 bps (0.025%) – executes immediately at market price.\
  \&#xNAN;*(Base rate* – *3 bps; VOOI, as a Gold Partner, enjoys a reduced rate of 2.5 bps.)*

For more details refer to the [Orderly documentation](https://orderly.network/docs/build-on-omnichain/user-flows/custom-fees#overview-of-fee-structure).

## Ostium

**Ostium** charges 4 bps (0.04%) for opening position, which covers both the opening and the full closing of a position.&#x20;

* If a position is closed partially, each partial close is treated as a new trade and incurs an additional fee.

For more details refer to the [Ostium documentation](https://ostium-labs.gitbook.io/ostium-docs/ostium-trading-engine/opening-trades#protocol-opening-fee).

## VOOI Fee Approach

While VOOI strives to offer no additional fees for trading on supported perpetual DEXs, certain DEXs may still incur additional charges. However, these costs can be partially or fully offset by participating in the **VOOI Points and Referral Program.** For more details, see [vooi-pointsprogram](https://docs.vooi.io/vooi-pointsprogram "mention")

### VOOI Fees

A small additional fee is applied on top of trading fees:

**Aster**

* **VOOI** does **not apply any additional fees**.

**Hyperliquid**

* **VOOI** charges a flat **0.015% (1.5 bps)** fee for taker and maker orders.

**Orderly**

* **VOOI** charges a **0.015% (1.5 bps)** fee for both taker and maker orders.

**Ostium**

* **VOOI** does **not apply any additional fees**.


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