Liquidation is a margin event, not a price event
The first thing to get straight: an exchange does not close your position because you were wrong about the market. It closes it because the loss on the position has eaten through the margin you posted for it. Direction is what most traders blame. Margin is what actually kills the account. Once you see leverage as a rule about how much room you have rather than a multiplier on your genius, the whole thing gets less mysterious — and a lot less flattering.
Here is the plain version. Put down $500 of margin and open a $10,000 position — that is 20x. Your money is 5% of the position. So the position only has to move about 5% against you before your $500 is gone, and the exchange liquidates to stop the loss spilling past the collateral you actually posted. (In practice liquidation triggers slightly before the full 5%, because the maintenance margin and liquidation fee sit in front of your last dollar. The rounder number is close enough to reason with.)
The distance-to-liquidation nobody checks
Every leveraged position has one number that matters more than entry, target or stop: how far the price can travel against you before you are force-closed. Call it the distance-to-liquidation. It is not a mystery figure — it falls straight out of your leverage:
- 5x → roughly 20% of room before liquidation.
- 10x → roughly 10% of room.
- 20x → roughly 5% of room.
- 50x → roughly 2% of room.
- 100x → roughly 1% of room.
Now put that against how the assets actually move. A liquid pair swinging 2–4% inside a single hour is an ordinary Tuesday, not a black-swan event. So a 50x position is not “aggressive” — it is a bet that ordinary hourly noise does not happen while you hold. On 100x, a routine wick that you would not even notice on the chart is a full account loss. The trader was not wrong about the trend. The trend simply breathed, and the margin could not survive the breath.
Why 20x feels fine — until it isn't
Twenty times leverage feels safe for a specific and treacherous reason: it usually is, right up to the one time it isn't. Say the pair drifts 5% in your favour over an afternoon. On 20x that 5% is a 100% gain on your $500 margin — you doubled your money on a move you would have shrugged at unleveraged. The feedback is intoxicating and it is a lie by omission: the same 5%, going the other way, is the entire position. Leverage is symmetric on the way up and terminal on the way down, because you can compound a win but you cannot come back from a zero.
This is the trap of the winning streak. Ten good 20x trades in a row do not prove the size is safe; they prove the market has not yet handed you the ordinary 5% adverse move that the size guarantees you cannot survive. The account does not die from a losing strategy. It dies from a winning one, run at a size where a single normal loss is fatal.
The account dies from sizing, not direction
Look at a blown crypto account honestly and the autopsy is almost always the same. The directional calls were fine — often better than fine. What killed it was margin math:
- The one oversized entry. Nineteen trades at $500 margin, then one at $3,000 because the setup “felt certain.” The certain one loses, and it loses six trades' worth of margin in a single stop.
- Cross-margin dragging the book. On cross-margin, a bad position feeds on the collateral of your good ones. A single trade going wrong can liquidate an entire balance that a per-position (isolated) margin would have ring-fenced.
- Leverage creeping up unnoticed. Week one at 5x, week three at 25x, no decision ever made to change it. The distance-to-liquidation quietly shrank from 20% to 4%, and one ordinary candle finished what no losing thesis could.
None of these is a market-reading problem. They are all the same sizing problem wearing different clothes. That is the uncomfortable part: you can be right about the coin and still hand back the account, because the position size, not the price view, decided whether an ordinary loss was survivable.
Seeing it in your own trades, in dollars
You cannot manage what you never total up. The honest move is to price your own history: pull your closed positions from Binance, Bybit or Coinbase and look at the trades that actually cost you, not the ones you remember. It is almost never the whole strategy. It is a handful of oversized entries, each one visible in the data long before it hurt.
That is the entire job of PnL Book for crypto traders: it analyses your own past trades and totals the damage per habit, in dollars. Tag the oversized entries and read the invoice at the end of the month — “oversized: −$2,180” is not a feeling, it is a number. Perps aren't only about leverage, either; the fee that quietly bleeds a held position is the funding rate, and we cover that in funding rates explained. And when a liquidation is followed by a bigger, angrier re-entry — the way accounts usually actually end — that specific spiral gets its own piece: revenge trading crypto.
To be plain about what this is not: PnL Book does not predict prices, hand you signals, or promise a single dollar of return. It reads your own filled trades — import a CSV export or a screenshot of any exchange — and shows you, in your own currency, what your leverage habits have already cost. The same arithmetic runs on the forex side too, where the leverage is quieter but the mechanism is identical for forex and funded traders importing MT4 or MT5 statements. Distance-to-liquidation is a number you can check before the entry. Almost nobody does. Checking it is the cheapest edge in leveraged trading, and it is free.