The Liquidation Line: How to Find the Price That Turns You Into a Forced Seller

You press buy on a 10x long at $77,000 and the exchange is perfectly friendly. That courtesy ends around $69,685. Cross that line and you are no longer a trader — you are inventory the market is about to liquidate.

That number is your liquidation price, and it is worth understanding not as a piece of trivia but as the exact spot where the exchange stops being your broker and starts being the other side of your forced sale. Most beginners treat it as a vague "somewhere below entry." It is not vague. It's arithmetic.

Leverage decides how much room you have

The whole thing reduces to one idea: leverage multiplies your position with borrowed money, so the margin you actually put up grows thinner the higher the leverage goes. Your liquidation price is the level where what you'd lose equals that thin slice of margin you posted.

In its cleanest form, on a long position the math is:

Liquidation price = entry price × (1 − 1/leverage + maintenance margin)isolated long liquidation formula

The "maintenance margin" is the sliver of collateral the exchange requires you to keep on the position at all times — typically 0.4% to 1% of position size on big coins, more on alts. It exists because the exchange doesn't want to hold a position that's already underwater in the seconds it takes to close it.

Work it with real numbers. Long BTC at $77,000, 10x leverage, 0.5% maintenance:

• 10x: 77,000 × (1 − 0.10 + 0.005) = $69,685 — you survive a ~9.5% drop
• 20x: 77,000 × (1 − 0.05 + 0.005) = $73,535 — ~4.5% of room
• 100x: 77,000 × (1 − 0.01 + 0.005) = $76,615 — a 0.5% hiccup kills you

That last row is the whole lesson in one glance. Leverage doesn't just amplify your wins; it moves your liquidation price closer to entry, exponentially. The higher you crank it, the less price needs to move against you before the exchange pulls the trigger. At 100x, a routine Bitcoin wiggle isn't a drawdown — it's a funeral.

The number on your screen is a polite fiction

Here's where the plumbing matters more than the headline formula. Actual liquidation is triggered against the mark price — a dampened average of prices across several spot exchangesmark price from several spot exchanges — not the last traded price. The exchange does this deliberately, to stop one rogue order or manipulated print from liquidating everyone. That's fair in intent and brutal in practice: in a fast market the mark can lag, and by the time the engine acts the real, traded price has often blown straight through your theoretical line. The slippage on the way out usually makes your actual exit worse than the calculator promised.

Isolated versus cross margin changes the equation too. In isolated mode, only the margin you set aside for that one position is at risk — your liquidation price sits where that single chunk runs out, so a losing trade can't drag your whole account down with it. In cross mode the entire account balance acts as collateral, which pushes your effective liquidation price further from entry while you have spare cash — and then, when the whole account turns against you, every position liquidates together because all of it was the collateral. Cross margin forgives small losses by reaching into your pocket; it punishes big ones by taking the entire pocket.

Add the quiet deductions and the truth gets uglier still. Trading fees and funding payments get skimmed off your margin, so your real liquidation price is a shade closer to entry than the clean formula. Some exchanges use partial liquidation, shaving a piece of the position instead of the whole thing — which sounds merciful until you realize the remaining stack keeps the same fragile distance to the line.

Your number is everyone else's number

Now step back from your own screen, because this is the part that turns a personal-safety lesson into a market-mechanics one. Your liquidation price is not special. Every leveraged long on the same coin has one clustered within a few percent of yours, because human beings pick the same round entry levels and the same round leverage. When price breaks a support level, it doesn't liquidate one overconfident account — it liquidates the whole clustered layer at once, and that forced selling pushes price down into the next layer, which liquidates, which pushes price further. That's the cascade, and you can see exactly what it does to the tape.

October 2025 gave the textbook version: a tariff headline on top of a stretched book sent over $19 billion of positions to liquidation in one move, roughly $16.7 billion of it longs, touching about 1.6 million accounts$19 billion liquidated in October 2025. Perpetual open interest — the total size of open leveraged bets — collapsed 43%, from about $217 billion to $123 billion, in days. That is what deleveraging looks like when the forced sellers all want out at once.

The uncomfortable, useful part is that the conditions were visible before the trigger. Elevated open interest and lifted funding rates — where longs pay shorts a premium just to keep their leverage on — are the fingerprint of a crowded long booklong squeeze risk from elevated funding. A crowded book isn't a forecast; a good macro headline can rescue it. But it is a standing invitation for a cascade, and the forced-actor math means the losers aren't chosen by judgment. They're chosen by whoever stacked the largest bets closest to the mark price.

So when you buy leverage, you aren't just accepting that a number on a screen will eventually be hit. You're volunteering to become the forced seller that makes everyone else's liquidation line reachable — unless you build in enough room that the market would have to break something structural to reach you. Keep your liquidation price far, far away, by sizing the position instead of cranking the multiplier. The trader who loses is rarely the one with the better directional call. It's the one whose number was closest to where the market actually went.