A stop-loss order is an instruction that sits dormant until an asset reaches a chosen price, then triggers a sell. Traders use them to cap how much a position can lose without having to watch a screen.
Sounding like a guarantee, it is not one. Understanding the gap between what a stop-loss promises and what it delivers is most of what there is to know about them.
How a stop-loss works
Three things happen in sequence.
- You set a stop price, below the current market price for a long position.
- The order sits inactive. It is not in the order book and nobody can see it.
- When the market trades at or through your stop price, the order activates and is sent to the exchange as a live order.
Note step three carefully. Activation is not execution. The stop price determines when your order enters the market, not the price you receive.
Stop-market vs stop-limit
Everything about how a stop performs comes down to which of these you use.
| Stop-market | Stop-limit | |
|---|---|---|
| What triggers | A market order | A limit order at a price you set |
| Execution | Effectively certain | Only if the market reaches your limit |
| Price received | Whatever the book offers | Your limit price or better |
| Main risk | Slippage in a fast market | No fill at all, position stays open |
Both fail, in opposite directions. A stop-market gets you out and can fill far below your stop in a violent move. A stop-limit protects your price and can leave you holding a position that has fallen straight past it.
A worked example
You hold a token bought at $100 and set a stop at $90.
The ordinary case. Price drifts down through $90 on a normal day. Your stop triggers, the market order hits a reasonably deep book, and you fill around $89.95. The mechanism did its job.
The gap case. Bad news arrives overnight. The next trades happen at $71. Your stop triggers at $90 as designed, and the market order fills at $71, because there was nothing in between. You did not lose 10%. You lost 29%.
The stop-limit case. Same news, but your order was a stop-limit with a limit of $89.50. It triggers at $90 and finds no buyer at or above $89.50. Nothing fills. You still hold the position at $71.
None of these is a malfunction. All three are the mechanism working exactly as specified.
Where stop-losses fail
- Gaps and fast markets. Price can skip past your level entirely. Crypto trades continuously, which removes overnight gaps and does not remove violent single-candle moves.
- Thin liquidity. A stop triggering into an empty book fills at whatever remains, which during the crash of 10 October 2025 meant market makers had withdrawn and books were effectively one-sided.
- Exchange outages. Several venues went down during that same event, and some users found their stop orders did not execute at all. An order you cannot reach is not protection.
- Flash crashes on a single venue. When Bitcoin printed $8,200 on Binance.US in October 2021 while trading near $65,760 elsewhere, stops on that venue triggered against a price dislocation that reversed within a minute.
- Stop hunting. Clusters of stops sit at obvious levels, such as round numbers and recent lows. Those clusters are liquidity, and larger participants know where they are.
Stop hunting, explained plainly
Most traders place stops in similar places, which means stops pile up at predictable levels.
A large order pushing price down into that cluster triggers a wave of automatic selling. That selling is exactly what a large buyer needs to fill a big position without moving the market against themselves. Price then recovers, and the traders who were stopped out watch it go back up without them.
Whether any individual instance is deliberate manipulation or ordinary market mechanics is usually impossible to prove. The pattern is real either way, and it is why obvious levels are crowded ones.
How traders actually use them
Descriptively, not as a recommendation, here is what the practice looks like.
- Volatility-based placement. Rather than a fixed percentage, some traders size the distance to the asset's normal range of movement, on the reasoning that a stop inside ordinary noise will trigger on noise. On a volatile altcoin that distance can be very wide.
- Structure-based placement. Others place stops beyond a level that would invalidate their reason for holding, rather than at an arbitrary loss figure.
- Trailing stops. These move up as price rises and stay put when it falls, which locks in gains while leaving room to run.
- Avoiding round numbers. Since $50,000 and similar levels attract stop clusters, some traders deliberately sit away from them.
- No stop at all. Long-term holders frequently use none, on the view that a stop converts a temporary bear market drawdown into a permanent exit. That position has its own failure mode, since it depends entirely on the asset recovering.
What the right approach is depends on your goals, your time horizon, and your tolerance for being wrong, and no page can answer that for you.
Stop-loss on spot vs leveraged positions
Worth separating, because the stakes differ.
On a spot position, you own the asset. A stop-loss is a tool you chose to use, and if it fails you still hold what you bought.
On a leveraged position, forced liquidation happens automatically when your margin runs out, whether or not you set a stop. There, a stop is an attempt to exit before the exchange exits for you.
Where mb.io fits
mb.io is a spot exchange, so positions are never liquidated by the platform. You own what you buy, and a decline is a fall in value rather than a forced exit.
mb.io is backed by MultiBank Group, a financial institution founded in 2005 that serves more than 2 million clients across 100+ countries.
- Regulated by VARA in the UAE and AUSTRAC in Australia
- 40-nanosecond execution speed
- 10/10 security score from Hacken, an independent blockchain security auditor
- Institutional-grade MPC custody powered by Fireblocks, with segregated client funds
- A curated list of assets, so you're not trading into thin books on tokens nobody supports
- 24/7 customer support, on web and on the iOS and Android apps
Open your account and start trading on mb.io.
Frequently asked questions
Does a stop-loss guarantee my maximum loss?
No. It determines when your order enters the market, not the price it receives. In a fast move or a thin book, a stop-market order can fill well below the stop price.
What is the difference between a stop-loss and a stop-limit?
A stop-loss usually triggers a market order, which fills at whatever is available. Triggering a limit order instead, a stop-limit protects your price and may not fill at all.
Can an exchange see my stop-loss?
The exchange holding the order knows about it. It does not appear in the public order book until it triggers, so other traders cannot see your individual level.
What is stop hunting?
Price moving into a cluster of stops, triggering them, and then reversing. Whether it is deliberate or a natural consequence of stops sitting at obvious levels is generally impossible to prove.
Why did my stop-loss trigger and then the price recover?
Because your level sat inside the asset's normal range of movement, or within a cluster that got swept. This is the most common complaint about stops, and it is a placement question rather than a fault in the order.
Do stop-losses work during a crash?
Less reliably than at any other time. During the crash of 10 October 2025, market makers withdrew, liquidity evaporated, several exchanges had outages, and some stop orders failed to execute.
Should I use a stop-loss?
That depends on your time horizon and strategy, and it is not something this page can decide for you. Active traders commonly use them, long-term holders often do not, and both approaches carry their own risks.
