What Is Slippage in Crypto? It Is Not a Speed Setting. It Is Your Price Floor.

Slippage is the gap between the price you were shown and the price you got. The tolerance box is not a speed control. It is the worst price you agree to accept before the trade cancels.

That distinction is the whole article, and almost nothing written about slippage says it plainly.

People meet this setting for the first time in a hurry. A swap has failed once or twice, a box appears offering 0.5%, 1%, 5% or a field to type your own, and the obvious move looks like typing a bigger number. Bigger sounds like more room. More room sounds like the trade going through.

It does go through. That is exactly the problem.

The setting is a floor, not a dial

When you swap one token for another, you are trading against a shared pot that holds two things at once: a pile of the token and a pile of real money. Your trade changes the balance between them, and that balance is the price.

Between the moment you tap confirm and the moment the network actually processes it, other people are trading against the same pot. The price you were quoted is a photograph. The price you get is whatever the pot says when your turn arrives.

Uniswap, whose engineers largely invented this style of trading, define it in one line. Slippage, their documentation says, describes “alterations to a given price that could occur while a submitted transaction is pending.”

So the tolerance setting exists to put a limit on that. And here is the part almost every explainer leaves out: it is not a preference. It becomes a hard number written into your transaction, a floor for the least you will accept. Uniswap’s documentation is blunt about what happens underneath. If the trade “would return fewer output tokens than this value, the transaction reverts.”

Reverts means it does not happen. Your money stays where it is. You pay a small network fee for the attempt and nothing else moves. Nothing has been taken from you except a few cents and a minute of your afternoon.

Read that as good news, because it is. A cancelled trade is the setting doing its job. It refused a deal you had already told it you would refuse. Out of every moving part in this process, it is the one piece of machinery working purely on your behalf, and the number you type is the only instruction it ever receives.

So what does 100% actually do?

It sets that floor at the ground.

A 1% tolerance says cancel this if I would end up more than 1% worse off than quoted. A 100% tolerance says do not cancel it at all. Any fill is acceptable. There is no longer a price bad enough to stop the trade.

Now, why do people do it? Not because they want a worse price. Helius, one of the companies that builds the plumbing Solana runs on, put the reason in writing in its research on how value gets taken out of ordinary trades. “Traders set high slippage,” it says, “not to accept worse prices but to ensure fast order execution.”

That is the misunderstanding, stated by people who watch it happen at scale. The setting has nothing to do with speed. It never did. It only ever answered one question, which is how bad a deal you would still take.

You can see how the confusion forms. Raising the number does make failed swaps stop, so it looks like a fix. What actually stopped was the cancelling, not the failing. The trades that used to be refused now complete, at the prices that were getting them refused.

How much room does a trade actually need?

This is answerable rather than theoretical, so we went and answered it for our own token this morning.

We asked Jupiter, a Solana service that hunts across every pot trading a token to find the best route for a swap, what a real buy of various sizes would cost right now. It reports how far each one would push the price by itself. Anyone can run the same check on any token.

A hundred dollars moved the price by about half a percent. A thousand dollars moved it by under one percent. Even fifty thousand dollars, which is a great deal more than most people reading this will ever put into a meme coin, needed about three and a half percent.

Hold those numbers next to a 100% setting. The widest trade on that chart needs roughly three and a half percent of room. Typing 100 does not give you thirty times the safety. It gives away thirty times the room, and every bit of that gap is space where a worse price is still allowed.

Nothing forces the pot to fill you at the best available price. It fills you at whatever price the conditions produce, and your floor is the only thing that ever says no.

Something lives in that gap

Here is why the empty space is not merely unused.

There are automated programs that watch trades waiting to be processed. When one of them spots a trade with a lot of room underneath it, it can buy just ahead of you, let your trade push the price up further, and sell straight after. You get filled at the top of the move it created. It keeps the difference.

The nickname for this is a sandwich, because your trade ends up in the middle of two others.

The scale of this is not small, and it is documented rather than rumoured. In its report on the subject, Helius traced a single one of these programs over thirty days between December 2024 and January 2025. It ran 1.55 million of these sandwiches and took 65,880 SOL, worth about $13.43 million at the time. The average haul per trade was about $8.67, which tells you the targets were ordinary people rather than whales.

By Helius’s account, that one program was behind close to half of all such attacks on Solana.

Two details from that report land close to home for anyone reading this site. Helius names the vulnerable group directly, writing that meme coin traders are particularly exposed precisely because they set high tolerances on thin, fast-moving tokens. And of the twenty most-sandwiched tokens it identified, sixteen had been launched on pump.fun. That is the same launchpad our own token came from, which we pulled apart in detail in what a pump.fun bonding curve actually is.

None of this means every wide trade gets taken. It means the room you leave is a standing offer, and there is an industry set up to accept it.

Why small pots make all of this worse

Everything above scales with how much real money is sitting in the pot you are trading against.

A deep pot absorbs your trade without noticing. A shallow one moves hard, so the same purchase arrives worth noticeably less than the screen promised, and a wide tolerance lets it happen quietly. This is the practical consequence of something we measured in how meme coins work, where the headline market cap turned out to be many times larger than the money actually available to trade against.

It is also why the depth figure is worth looking at before the price. Where to find it, and which numbers on those sites quietly mislead you, is how to read a DexScreener chart. The live figures for this token are always on our stats page.

What to take from this

We are not going to tell you what number to type. That depends on the token, the size of your trade and the day, and anyone handing out a single figure is guessing on your behalf.

What is worth carrying away is smaller. The box is not asking how badly you want the trade. It is asking what you would still accept, and that is the question to answer.

A trade that keeps failing is telling you something real about the pot. It is information, not an obstacle to be overpowered with a bigger number. Sometimes the answer is a little more room. Sometimes it is that the thing you are buying cannot absorb what you are trying to spend.

If you want to see the other end of this, where people lose everything rather than a few percent, that is how wallets actually get drained. And the setting is one line of a longer process we walk through in how to buy $CATE.

This site is community run and does not speak for the project. The Uniswap and Helius material above was read from their own published documentation and research on 13 August 2026, and the price figures were requested the same morning. Nothing here is financial advice.