OKX has announced the listing of Aster (ASTER) on its spot trading markets, with trading set to commence on October 17, 2025. The listing will follow a structured timeline to ensure a smooth introduction to the market.

Deposits for ASTER will open at 2:00 am UTC, followed by a pre-open session from 5:00 am to 6:00 am UTC. Spot trading for the ASTER/USDT ($1.00) pair will officially begin at 6:00 am UTC. More details can be found here.

Trading Rules and Risk Controls

To mitigate market volatility during the initial phase of trading, OKX will implement specific risk control measures. For the first five minutes after trading begins, the maximum amount per limit order will be capped at $10,000. These restrictions will be lifted after the initial five-minute period.

Price limit rules will also be in effect during the pre-open session and the first ten minutes of continuous trading. These rules are based on index calculations, with parameters subject to adjustment by OKX according to market conditions.

Understanding the Pre-Open Session

The pre-open session allows traders to submit buy and sell orders within specified limits before continuous trading begins. During this period, orders are placed around the index price, with buy orders required to be lower than the index price plus a percentage limit, and sell orders higher than the index price minus a percentage limit.

At the end of the pre-open session, invalid orders are canceled, and the last index price is used to initiate continuous trading. Orders that remain valid are carried over into the live trading session.

Aster is a decentralized perpetual exchange offering MEV-free, one-click trading with leverage up to 1001x. The asset is available on the BSC Chain under the contract address 0x000Ae314E2A2172a039B26378814C252734f556A.

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