Leverage and liquidation: understand it before you multiply it

Leverage lets you open a position larger than the capital you commit. With 1,000 USDT at 10× you control a 10,000 USDT position. It is a powerful tool for professionals and the number-one cause of blown accounts among beginners. Understanding exactly how it works changes how you use it.

Margin and exposure

When you open a leveraged position, the platform locks an initial margin: the position divided by the leverage. The rest is, in effect, advanced by the platform. But gains and losses apply to the whole position:

Notice the dollar loss is identical in every case: 200. What changes is the share of margin it represents — and therefore the distance to liquidation.

What is liquidation?

When losses approach the margin amount, the platform force-closes the position so it does not lose the money it advanced. That is liquidation. With isolated margin you lose that position’s margin; with cross margin your whole account balance backs the position, which can be even more dangerous.

In practice liquidation happens slightly before the margin is fully gone, because of the maintenance margin (often 0.4% to 1% of the position depending on size). Approximation for an isolated long:

At 100×, a 0.5% move — a few seconds on a volatile Bitcoin day — wipes you out. Platforms often add liquidation fees on top.

The golden rule: stop before liquidation

If your stop-loss is at −3% and liquidation at −4.5%, the stop protects you. If it is at −6%, liquidation decides for you, with fees as a bonus. Always check that your stop is clearly closer than the liquidation price, allowing for possible slippage.

Leverage does not change risk… if you size correctly

Here is what many miss: a trade’s risk is the loss at the stop, not the leverage. With the 1% rule, two traders can risk exactly 100 USDT on the same position, one unleveraged and one at 10×. The second simply locks up less margin and keeps the rest of the capital free.

The real danger is behavioural: high leverage allows oversized positions, and a nearby liquidation price prevents a logical stop. You end up risking 20% or 50% of the account on one trade without noticing.

Hidden costs

• Funding fees on crypto perpetual contracts: paid or received roughly every 8 hours depending on the gap between contract and spot price. In euphoric phases, longs often pay significant funding.
• Borrowing interest on classic margin trading and in stock brokerage accounts.
• Commissions charged on position size, not margin: at 10× they weigh ten times more relative to your stake.

Good practice

1. Start without leverage, or at 2–3× at most.
2. Compute position size from the stop, then pick the leverage that leaves a comfortable buffer.
3. Prefer isolated margin to cap the maximum loss to the position concerned.
4. Practise: the Bullmarket simulator lets you trade at 1× to 20×, shows each position’s liquidation price and closes it automatically if reached. Better to live through your first liquidation with virtual money.