To place an order in Binance Wallet's Pro Mode, the core steps are selecting the order type, setting the trigger price and slippage, then authorizing and submitting. Limit orders rely on "Secure Auto Signature" (SAS) to trigger execution. You need to authorize it the first time, and the authorization is valid for 7 days. After submitting an order, you can check its status in the "Open Orders" tab. If you do not need an order, simply click "Cancel" next to it.
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Where to Find Pro Mode
Open the Binance App, go to [Assets] → [Wallet] → [Trade], and switch to [Pro] mode at the top of the page. Pro Mode mainly supports two order types: Limit orders and Market orders.
Limit orders currently only support Binance Keyless Wallets, while market orders support both mnemonic wallets and private key wallets. If you are using a mnemonic or private key wallet, the limit order feature is not available for now.
What to Fill in When Placing an Order
After selecting the token and trade direction (Buy/Sell), set the following in order:
Order Type: Choose "Limit" or "Market".
Trigger Price (Limit orders only): Set the price at which you want the buy or sell to trigger.
Amount: For buying, you can currently only enter the native token amount (such as BNB, SOL). For selling, enter the amount of the token you want to sell.
Order Settings: Includes slippage, gas fee, and Anti-MEV, which are the same options as a normal Swap.
Slippage determines the worst execution price you are willing to accept. If you do not set it manually, the system will calculate a recommended value.
Slippage Protection for Limit Orders
Slippage is not a random number. It directly determines whether your order will be executed.
The logic from Binance is: after the order is triggered, the system fetches a real-time quote from DEX and compares it with your minimum slippage threshold. If the final amount you can receive is lower than the minimum allowed by your slippage setting, the order will be automatically canceled.
For example: You use 1 BNB to buy APX with a limit price of $0.05 and 10% slippage. At the time of placing the order, 1 BNB ≈ $600, so the minimum acceptable amount is about 10,800 APX. When triggered, BNB drops to $500, so 1 BNB can only get 10,000 APX. This is below the minimum, so the order is canceled. This mechanism prevents you from executing at a price much worse than expected during high volatility.
What is Secure Auto Signature (SAS)?
Limit order execution does not rely on on-chain pending orders. It is done in the background by Secure Auto Signature (SAS). After you authorize SAS, the system automatically signs and executes the Swap for you when the trigger price is reached, without requiring manual confirmation.
SAS runs in a Trusted Execution Environment (TEE). Your private key is isolated and protected, and Binance cannot access it. The first authorization is valid for 7 days, and each new limit order resets this period. If there is no relevant activity for 7 days, the authorization expires, and you need to re-authorize the next time you place an order.
You can manage or revoke this authorization at any time in [Settings] → [Secure Auto Signature].
Limit Orders Do Not Lock Funds
This is one of the biggest differences between Binance Wallet Pro Mode limit orders and other DEX limit orders: funds are not locked after placing an order. You can still use these balances for other trades. The same balance can be used for multiple limit orders at the same time. Whichever triggers first executes first.
The trade-off is: if your wallet balance is insufficient when the order triggers, the execution will fail. So if you use the funds while an order is pending, you need to make sure you top up the balance before the price triggers.
Gas fees are only charged when the order actually executes. Canceling or modifying an order costs nothing.
Canceling Orders and Checking Order Status
After submitting an order, you can see all active orders under the [Open Orders] tab. To cancel, simply click [Cancel] next to the order.
Completed, failed, expired, or canceled orders can be found in [Order History].
Why a Limit Order May Not Fill
Even if the price reaches your trigger point, the order may not execute. Possible reasons include:
The real-time quote at execution is unfavorable and exceeds your slippage tolerance.
Insufficient liquidity to execute at a reasonable price.
High market volatility causing the price to deviate instantly.
Insufficient wallet balance at the time of trigger.
SAS authorization has expired or been revoked.
Limit orders are "condition-triggered", not pre-placed on-chain orders. Reaching the price only triggers the system to attempt execution. Whether it succeeds depends on the market conditions at that moment.
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