03/20/2026
Alexey KuznetsovWhy the exchange rate changed during the exchange – and how to protect yourself
You did everything right: checked the rate, clicked "Exchange," and received less than you expected. Sound familiar? This isn't a system error or a scam. This phenomenon has a name—slippage—and it occurs on virtually every crypto exchange and exchange service. Let's figure out why the rate fluctuates during an exchange and what slippage is in crypto.
Key Takeaways
- Slippage is the difference between the expected and actual exchange rate.
- The lower the liquidity of an asset, the stronger the slippage.
- Market volatility requires stricter settings for acceptable slippage.
- Exchange aggregators help automatically find the best rate.
- Correct timing and transaction size are the main protection tools.
Table of Contents
- What is slippage in crypto and where it comes from
- Why liquidity is everything: how market depth affects us
- Is it my fault or the market's? Understanding Price Impact and slippage
- Why old slippage tolerances stopped working in 2026
- How exchange aggregators find workarounds for your rate
- Simple instruction: conducting an exchange without rate losses
- FAQ
- Conclusion
What is slippage and why does it occur at the worst possible moment?
Slippage is the difference between the rate you see before confirming a transaction and the rate at which the transaction is actually executed.
Slippage occurs for several reasons:
- the cryptocurrency market operates in real-time: in the seconds it takes for a request to be verified and executed, the price has time to move;
- the transaction volume may be large enough to "eat up" several price levels in the order book;
- during periods of high volatility, the rate changes during exchange especially sharply – sometimes by 1–3% in a few seconds.
In practice, it looks like this: you see a BTC/USDT rate of 67,400, press "Exchange," but the transaction is executed at 67,180. A difference of 220 dollars when exchanging one bitcoin is significant.
Slippage is not a bug or a scam. It is a fundamental property of any market with live pricing. But it can be controlled.
Market mechanics: how liquidity affects the final rate
To understand why the rate changed during an exchange, it is necessary to understand the concept of liquidity. Liquidity is the ability to exchange a coin for money here and now without losing out on the price. The higher it is, the faster and more profitable the exchange will be.
When liquidity is high, even large trades barely move the price: there are thousands of sellers and buyers at every price level in the order book. When liquidity is low, a small trade can "walk through" several levels of the order book and receive an unfavorable average rate.
Impact of liquidity on slippage:
| Asset | Liquidity | Typical slippage | Risk at $10k |
|---|---|---|---|
| BTC, ETH | Very high | 0.01–0.1% | $1–$10 |
| SOL, AVAX, MATIC | Medium | 0.1–0.5% | $10–$50 |
| Small altcoins | Low | 1–5% and higher | $100–$500+ |
A separate story is decentralized exchanges. There, pricing is built on AMM (automated market maker) algorithms.
The formula by which the price is calculated depends directly on the ratio of assets in the liquidity pool. The larger the trade relative to the pool, the more the price shifts and the more significant the resulting slippage.
Difference between slippage and Price Impact in simple words
These two concepts are often confused even by experienced users. Slippage is the price deviation that occurs between the moment the price is displayed and the moment the trade is executed. It is caused by external factors: market movement, network latency, competition for the block.
Price Impact is how much a specific trade shifts the market rate. If the exchange interface issues a warning about a price impact of 2.4%, it means the purchase volume is too large for the selected liquidity pool. As a result, you are pushing the price up yourself and buying the asset more expensively than originally planned.
How your own exchange can affect the asset price
Imagine a pool of water: this is the liquidity pool. If you carefully lower your hand, the level barely changes. If you jump in with a run-up, a wave spreads in all directions. This is exactly how price impact works on a DEX. It feels like this: you exchanged $500 in a large pool – the rate didn't budge. You tried the same amount in a small one – and the price moved against you. This is a lack of liquidity.
For large trades with low-liquidity tokens, PI can be more important than slippage itself. Always look at both figures before confirming.
The role of market makers in forming a stable rate
Market makers are professional market participants (companies or algorithms) that constantly place buy and sell orders, maintaining the "depth" of the book. Their task is to provide a narrow spread and high liquidity.
On centralized exchanges, market makers play a huge role: they are the ones who ensure that a $10,000 trade is executed at a predictable rate. During periods of strong volatility, market makers often leave the market or significantly widen spreads – then slippage increases sharply.
2026 Volatility: why old slippage settings no longer work
Just a couple of years ago, a standard allowable slippage value of 0.5% seemed sufficient for most trades. Today, the market works differently.
2026 has brought several structural changes:
- trading volume on DEXs has grown significantly – more transactions compete for every block;
- memecoins and specialized tokens with extremely low liquidity are actively developing;
- macroeconomic uncertainty periodically causes "flash crashes";
- bots "sandwich" transactions of regular users if they see a gap that is too large in the settings.
If the rate changed during the exchange and the slippage setting was too strict, the transaction will hang or be rejected.
In today's realities, it is important to balance:
- for stablecoins: 0.05% - 0.1%;
- for top coins (ETH, BTC): 0.5%;
- for new tokens at the moment of listing: from 2% to 5%.
Do not set slippage "with a margin" (e.g., 10–15%) without extreme necessity. This is a direct signal to bots to execute your trade at the worst possible price within your limit.
Why exchange aggregators are the best tool against slippage
An exchange aggregator is a service that compares rates on dozens of platforms in real-time and automatically directs the trade where the conditions are best. How does this help fight the fact that the rate changes during exchange? In several ways:
- the aggregator splits a high-nominal transaction into several parts and executes them through different pools or exchanges;
- the algorithm chooses the source with the highest liquidity in real-time;
- the best aggregators offer protection from MEV (Maximal Extractable Value) – a mechanism that makes frontrunning by bots more difficult.
The Nadoswap service works on this principle: the system looks for the best route and shows the final rate including fees.
Advantages of aggregators over direct exchange:
- automatic rate search among dozens of sources;
- splitting the trade into parts;
- transparency;
- MEV protection;
- time saving.
Simple instruction: conducting an exchange without rate losses
Follow these steps, and you will significantly reduce losses from slippage.
- Check the current market volatility.
- Assess the liquidity of the asset.
- Split a large sum into parts.
- Set the allowable slippage consciously.
- Use an aggregator.
- Choose your time wisely.
- Always check the final figures before confirming.
These simple actions will turn an unpredictable exchange into a controlled process and help save more funds with each trade.
FAQ
Why did the rate change during the exchange if I pressed everything quickly?
Even a second is enough for a rate to change in an active market. There is always a delay between the price display and transaction execution – technological and network-related. It is at this moment that slippage occurs.
What is slippage in crypto and is there a way to completely avoid it?
It is impossible to completely avoid slippage in live market conditions. It can be minimized: through aggregators, correct timing, splitting trades, and working with high-liquidity pairs.
Why does the rate change when exchanging stablecoins?
Stablecoins (USDT, USDC) have low slippage – usually less than 0.05% for standard amounts. But with very large sums or during periods of "de-pegging," a rate change is possible.
How does an aggregator reduce slippage?
An aggregator splits your trade into parts and distributes them across several pools or exchanges simultaneously. This reduces pressure on each individual source of liquidity.
Does the time of day affect slippage?
Yes, significantly. The US trading session (14:00–21:00 UTC) and the European session (07:00–16:00 UTC) provide the highest liquidity. At night, slippage is noticeably higher due to reduced market maker activity.
Is there a difference in slippage between CEX and DEX?
Generally, major centralized exchanges offer lower slippage for top pairs due to professional market makers. DEXs win in accessibility and lack of KYC, but slippage there is on average higher.
Conclusion
The rate changes during exchange not because something went wrong – it is a natural part of any live market's operation. Slippage and price impact arise due to the delay between the price request and trade execution, low liquidity, or large transaction volume.
Use aggregators for automatic searching of the best rate, set slippage consciously, and choose the moment for exchange wisely. If you want to learn more about how to choose the optimal exchange route and avoid hidden fees – check out our blog.