Slippage trading: what it is and how to reduce it

Slippage trading: what is it in plain words?

Slippage is the distance between the price you expect and the price you get. You press «buy» when the price is 100, the order reaches the market, and it executes at 100.40. Those 40 cents are the slippage. Nobody tricked you: in the time the order took to arrive, or because the quantity available at 100 was not enough, the price took a step.

The name comes from the English «to slip», and it is a fitting image. The price you see on screen is a photograph of one instant, the execution price is the one from the next instant, and in between the market keeps moving.

Why does slippage happen?

There are three causes, and they often work together.

• The speed of the market. After a news item, an economic release or a sudden candle, the price can move a lot in a few seconds. The order leaves when the price was one thing and arrives when it is another.
• Thin liquidity. The order book is the list of offers from those who buy and those who sell. If at 100 there are only ten coins for sale and you want fifty, you take the other forty at the following prices, a bit higher.
• The size of the order. The bigger it is, the more levels of the book it uses up. On thinly traded coins and at night, when fewer people take part, it happens more often.

That is why slippage is not the same for everyone and not the same every time. On a large coin on a calm day it can be tiny, while on a small coin during a crash it can weigh quite a lot.

Is slippage always a cost?

No. It can be negative, when you get a worse price, but also positive, when the price moves in your favor in the meantime and you get something better. The positive kind happens less often, and on a market order, anyone looking at real data tends to see more slippage against than in favor, because whoever executes immediately is taking what others are offering. Better not to count on it.

An example with numbers: how much does slippage cost?

An illustrative example, with invented numbers to show the mechanism. You open a 1,000 USDT position with a market order. The price you see is 100, the execution happens at 100.40, which is 0.40% of slippage, or 4 USDT, before the price has even moved.

Then the price drops and your stop is triggered. You had set it at 95, for an expected loss of 5%, but at that moment the market is falling fast and the execution comes in at 94.20. The real loss is 5.8%, not 5%. The risk you had decided to take has become a little bigger.

These are invented numbers, but the reasoning is real: slippage adds to the maker and taker fees and it is one of the costs covered in the article on how worthwhile online trading really is.

Does slippage hit the stop loss harder?

Yes, and it is one of the things beginners find out late. When a stop loss is triggered, it usually turns into a market order. The price has already passed the level, you are in a hurry to get out and you take what is there. So the stop limits the loss, but it does not fix its exact amount.

The worst case is a price jump, the so called gap, when the market restarts from a level far from where it stopped, for example after news overnight. With leverage, a worse than expected execution also brings the level of liquidation, and that is why it is better not to use all the leverage available.

How do you reduce slippage in trading?

It cannot be eliminated, and anyone who promises otherwise is selling something. You can reduce it with a few habits, though.

1. Use limit orders when you are not in a hurry. You set the maximum price you accept: if the market does not reach it the order does not execute, but you do not pay more than planned.
2. Avoid the frantic moments, such as economic data releases, big news and the opening of stock markets.
3. Choose liquid markets and do not split your sizes badly, because a smaller position uses up less of the order book.
4. Size your risk by allowing for a bit of slippage on your stop. The position sizing helps with exactly this.
5. Do not let your leverage sit at the maximum, because slippage weighs more when you are close to the limit.

What is the difference between slippage, spread and fees?

These are three different costs. The spread is the distance between the price at which you can buy and the one at which you can sell at that moment, and it is always there. The fees are the platform's rate, known in advance. Slippage, instead, is the gap between the price you see and the price you get, and you only know it afterwards, once the order has executed. That is why it is the easiest to forget, and the only one to estimate cautiously beforehand.

Trying it costs nothing: on a demo account with real prices you can open the same trade at market and with a limit order, and compare. The demo account guide explains how to use it well, and the complete path is in the guide to mindful online trading.

Where STA fits in

STA works on OKX derivatives: ten artificial intelligence agents analyze the markets twice a day, with a debate between a Bull and a Bear, and every card comes with its stop. Your funds stay in your OKX account. Execution and its costs, slippage included, are those of the platform, and it is worth reading them before you choose your size.

The DEMO is free forever, with real prices and the same cards as REAL. You need an account. During the launch phase, which began on 16 October 2026, STA's fees are temporarily disabled, even in REAL; the ordinary price list, suspended while the launch lasts, is 18% of the positive net result of each day, with no offsetting of losses. The history of the cards, losses included, is public on GitHub.

Frequently asked questions

This article is for information only and is not investment advice. Trading crypto-assets involves a high risk, including the total loss of the capital used. Numerical examples are for illustration.