Biswap slippage: set a safer limit for your first swap

For a routine swap, start with 0.5% slippage tolerance: if the quote is 1,000 tokens, this sets roughly 995 as the minimum you will accept. A low limit can make a trade fail if the price moves before it is processed; a high one can let it complete at a worse price.

Treasury swaps and pooled liquidity explain how a venue supports trading; what Biswap does with treasury swaps covers that side, while slippage tolerance protects the amount in your own trade. If you are used to a centralised exchange, think of it as a price boundary attached to your order.

Slippage tolerance sets your minimum output

Slippage tolerance is the largest difference you will accept between the quoted output and the output when the swap executes. A smart contract, the code that carries out the trade, checks this limit before sending your tokens.

For example, if the quote is 1,000 tokens and your tolerance is 0.5%, the minimum output is 995. If the pool can provide only 994 by the time the trade runs, it rejects the swap instead of giving you less than your limit. Ethereum.org’s guide to token swaps describes this kind of minimum-output protection.

The quote can change because other trades alter the pool while your transaction waits for a block, a batch of confirmed network activity. A large trade can also move the pool price as it executes. This price impact depends on your trade size and pool liquidity; raising your tolerance does not reduce it.

Choose a limit from the pool and token

For a liquid pair with a steady price, I would start around 0.1% to 0.5%. A fast-moving or thinly traded token may need more, perhaps 1% or 2%, but check the quote and token before increasing the limit.

Here is the practical before-and-after: before, the screen quotes 1,000 tokens with 0.5% tolerance, so you must receive at least 995. After the quote shifts to 992, the swap fails. You can refresh the quote and reassess; changing tolerance to 1% would lower the floor to about 990, but only accept that if the new output still suits you.

If the app flags high price impact, try a smaller trade or a deeper pool instead of widening tolerance. For example, splitting a large swap into smaller trades can reduce the price movement each trade causes, though each transaction still needs network fees.

Check the transaction before signing

On Biswap, review the token pair, quoted output, minimum received, and tolerance before confirming in your wallet. Also check the network: a swap on BNB Smart Chain needs that network selected and enough BNB to pay gas, the network fee for processing the transaction.

A first swap may also ask you to approve the token. Approval lets the exchange contract spend that token from your wallet; it is a separate transaction and can require its own gas. Check that the wallet shows the token and action you expect, then confirm the approval and swap separately.

If the swap fails with an insufficient-output error, the price may have crossed your limit, or the pool may be too shallow. Biswap Support advises raising tolerance gradually for that error; first refresh the quote, check pool liquidity, and only lower your minimum if the trade still makes sense. A high limit cannot make a token with restrictive transfer rules safe to buy.

Set the tightest limit that lets a fair trade execute, and judge the minimum output before you sign.

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