> For the complete documentation index, see [llms.txt](https://docs.asterdex.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.asterdex.com/trading/perpetuals/afee-and-bonususd.md).

# AFEE & BonusUSD

### **AFEE**

Aster has a fee discount token called AFEE, which allows users to offset their trading fees on Pro Mode. AFEE is applied automatically and requires no manual activation.

* **1 AFEE = 1 USDT**
* **Total supply:** 100,000 AFEE tokens
* AFEE cannot be used as margin to open positions — you must deposit USDT or another supported collateral asset to trade.
* AFEE can only be used to offset trading fees; it cannot be used to deduct funding rates, liquidation fees, or other costs.
* Users do not need to enable Multi-Asset Mode to use AFEE.

**Note:** When users pay trading fees with AFEE, market makers and referrers will receive AFEE tokens as rebates.

### **BonusUSD**

Aster has a futures bonus token called BonusUSD for users who trade on Aster Pro Mode. BonusUSD is a USD-pegged token that traders can use as collateral to trade crypto futures on Aster Pro Mode.

**Note:** BonusUSD is a futures bonus token and cannot be withdrawn. Multi-Asset Mode must be enabled to use BonusUSD as collateral.

#### **How to Use BonusUSD**

**Step 1:** Go to the Campaign page and connect your wallet. Click \[Claim Reward] to check your eligibility and claim rewards. Your BonusUSD tokens will be automatically credited to your balance after you claim them manually.

**Step 2:** Go to your [Portfolio](https://asterdex.com/portfolio) and check your BonusUSD balance.

<figure><img src="/files/ExrywP8W5Tv5Vwe66t6f" alt=""><figcaption></figcaption></figure>

**Step 3:** (Skip if Multi-Asset Mode is already enabled) Enable Multi-Asset Mode to use BonusUSD as collateral. On Aster Pro mode, scroll down to Margin Ratio and select \[Multi-Assets Mode].

<figure><img src="/files/6N6I56IJ3InNlEIBItJO" alt=""><figcaption></figcaption></figure>

**Step 4:** Choose your preferred perpetual contract from the dropdown list and set your leverage.

<figure><img src="/files/hy5EYwCGjpiLEgskVO0i" alt=""><figcaption></figcaption></figure>

**Step 5**: Set your preferred order type. Aster Pro Mode supports Limit, Market, Stop Limit, Trailing Stop, and Hidden orders.

<figure><img src="/files/vW1IDxSf6JpogtWTT6kM" alt=""><figcaption></figcaption></figure>

**Step 6**: Monitor your positions and close them based on your exit strategy. All positions are listed in the \[Positions] tab.

<figure><img src="/files/hUpVY6Bqvp2iSXQGVYrL" alt=""><figcaption></figcaption></figure>

**Note:**&#x20;

* BonusUSD can only be used on Aster and cannot be withdrawn.
* Profits generated from trades using BonusUSD as collateral can be withdrawn.
* BonusUSD is only available on Aster Pro Mode on BNB Chain.