Is slippage the same as price impact?

Not quite. Price impact is the part caused by your own order size. Slippage is the total gap, including impact and any price moves while the order was in flight.

Why did my order fail with slippage?

The price moved against you by more than your limit between the quote and the fill. MemeSim shows the exact percentage.

Should I just set slippage to 100%?

Then you will always fill, but sometimes at a price far worse than you saw. Learn to size and time trades instead.

Memecoin glossary

Slippage: why your fill differs from the quote

Slippage is the difference between the price you were quoted and the price your order actually fills at. A slippage limit tells the trade to fail instead of filling if the price moves against you by more than you allowed.

Updated Oct 30, 2026

What is slippage?

When you tap buy, you see a quote: the current price. Your order then takes time to confirm. In that gap, other trades land and the price moves. Your own order also pushes the price, because a pool has limited liquidity. The fill you get is rarely the quote you saw.

The percentage gap between quote and fill is slippage. Positive slippage means a worse price than quoted. On fast memecoins it can be several percent in a second or two.

What is a slippage limit?

A slippage limit is the most you are willing to lose to that gap. Set it to 5% and your order fails if the fill would be more than 5% worse than the quote. Set it to 50% and almost anything fills, including a terrible price.

Low limits fail more often on fast coins. High limits fill but can hand you a bad entry. Most trading bots default somewhere in the middle. The right setting depends on how fast the coin is moving and how much you care about the price.

How do you reduce it?

Slippage comes from time and size. Work on both.

Trade smaller relative to the pool. Keep a buy under 1 to 2% of the coin's liquidity so your own order barely moves the price.
Avoid buying into a vertical candle. Price moves fastest exactly when FOMO is highest.
Set a limit you can live with, and accept that failed orders are part of trading fast coins.

How MemeSim simulates it

MemeSim quotes the live price when you tap, waits a random 1 to 3 seconds like a real confirmation, then fetches the price again. It adds your own price impact, computed as size divided by pool liquidity plus size, and compares the result with your quote. If the move is beyond your limit, the order fails with the exact percentage and you still pay the priority fee.

The default limit is 15%, and you can set anything from 0.1% to 100%. Every receipt shows the quote, the fill and the slippage percentage so you learn what your setting is costing you.

Questions

Is slippage the same as price impact?: Not quite. Price impact is the part caused by your own order size. Slippage is the total gap, including impact and any price moves while the order was in flight.
Why did my order fail with slippage?: The price moved against you by more than your limit between the quote and the fill. MemeSim shows the exact percentage.
Should I just set slippage to 100%?: Then you will always fill, but sometimes at a price far worse than you saw. Learn to size and time trades instead.