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Take a BTC long with the entry at 70,000 and the stop at 67,900, sized so that a stop-out costs 100 USDT including fees. Opened at 5x or at 14x, it loses the same 100 USDT at the stop. Leverage decides two things: how much margin the exchange holds, and, on isolated margin, the price at which it force-closes the trade. At 50x that price sits above the stop, so the stop never gets the chance to fill.
What the leverage setting controls
The notional is the position’s value, size times entry price. Margin is the part of your balance the exchange sets aside to back it, and leverage is the ratio of the two: a 3,000 USDT position at 10x needs 300 USDT of margin. On a USDT-margined perpetual each coin of size gains or loses one USDT per USDT of price move, at any leverage, so the size can be worked out from the loss you accept at the stop:
loss per coin = |entry − stop| + fee × (entry + stop)
size = money you accept to lose ÷ loss per coin
margin = size × entry ÷ leverage
Leverage only shows up in the last line. ROE (return on equity, the percentage on your position screen) divides PnL by margin, so at higher leverage the same USDT result reads as a bigger percentage, as the futures PnL calculator shows. The fee term covers the entry and the exit at the stop, each charged on the notional at that price, as in the position size calculator. The stop sits a buffer beyond the invalidation level, the close that proves the idea wrong, and the distance from entry to stop is 1R.
Why liquidation has to sit beyond the stop
On isolated margin, where only the position’s own margin backs it, the exchange closes the position once losses have eaten that margin down to the maintenance margin, a small slice of the position’s value set by the maintenance margin rate (MMR). That forced close is liquidation, and it costs close to the whole margin. If it sits between the entry and the stop, a pullback the plan allows for can end the trade before the stop ever triggers. The liquidation price calculator estimates where it happens with a single rate:
long liquidation ≈ entry × (1 − 1/leverage) ÷ (1 − MMR)
short liquidation ≈ entry × (1 + 1/leverage) ÷ (1 + MMR)
The distance from entry comes to roughly 1/leverage minus the MMR. At a 0.5 percent rate that is about 9.5 percent at 10x and 1.5 percent at 50x. On large positions, liquidation sits closer than a first-tier estimate suggests, because exchanges raise the MMR in tiers as the position grows. It also triggers on the mark price, an index-based price that can differ from the last trade during a spike.
Worked example: a BTC long on the 4h
The prices are invented. BTC’s 4h trend is up, and its last confirmed swing low, with five 4h candles printed on each side, is a higher low at 68,200. The leg from that low closed above the 69,900 swing high, a break of structure, and topped at 74,300. The idea is that the 4h uptrend holds, so the invalidation is a 4h close below 68,200. Recent 4h wicks ran 200 to 250 points past their levels, so the stop goes 300 points under the line, at 67,900. Entry is 70,000, on the pullback toward the broken high. The target is 74,200, just under the top and 4,200 points away, which the risk/reward calculator puts at 2.0R.
The account holds 10,000 USDT and a stop-out may cost 100 USDT of it, before any slippage past the stop price. The exchange charges 0.05 percent of the notional per side, and the MMR is 0.5 percent.
- Stop distance, 1R70,000 − 67,900 = 2,100
- Fees per coin0.0005 × (70,000 + 67,900) = 68.95
- Loss per coin2,100 + 68.95 = 2,168.95
- Size100 ÷ 2,168.95 = 0.04611 BTC
- Notionalabout 3,227 USDT
| Leverage | Margin | Liquidation ≈ | Cost at the stop |
|---|---|---|---|
| 5x | 645.47 USDT | 56,281.41 | 100 USDT |
| 14x | 230.53 USDT | 65,326.63 | 100 USDT |
| 50x | 64.55 USDT | 68,944.72, above the stop | About 66 USDT, liquidated before the stop |
The size and the fees are the same in every row. At 50x the liquidation estimate sits about 1,055 points under the entry, above both the stop and the 68,200 invalidation. A dip to 68,500 that holds the swing low leaves the idea intact and still liquidates the position, which costs about 66 USDT: close to the whole 64.55 USDT margin plus the entry fee. That is less than 100 USDT only because liquidation has become a much closer exit, inside the pullbacks the plan allows for, so it gets hit far more often than a stop at 67,900 would.
Picking the leverage for your stop
The leverage that puts liquidation right at the stop is about 100 ÷ (stop percent + MMR percent): the example’s 3 percent stop and 0.5 percent rate give 100 ÷ 3.5 ≈ 28.6x. Halve it and round down, here to 14x. With a 0.5 percent rate:
| Stop distance | Liquidation reaches the stop at about | Halved, rounded down |
|---|---|---|
| 1 percent | 66.7x | 33x |
| 2 percent | 40x | 20x |
| 3 percent | 28.6x | 14x |
| 5 percent | 18.2x | 9x |
| 10 percent | 9.5x | 4x |
The position size and liquidation price calculators show the exact figure. For a long it is 1 ÷ (1 − (stop ÷ entry) × (1 − MMR)), here 1 ÷ (1 − 0.97 × 0.995) = 28.69x. For a short it is 1 ÷ ((stop ÷ entry) × (1 + MMR) − 1).
28.69x leaves no room at all. At 28x the estimate lands at 67,839.20, about 61 points past the stop, and on a fast 4h candle the mark price can reach that line as the stop triggers, before its market order fills. Tiers and a closing fee some exchanges hold back can also move the exchange’s own figure. At 14x liquidation sits 2,573 points beyond the stop, more than another full stop distance.
Common mistakes
- Sizing by leverage. Putting up 500 USDT of margin at 10x opens a 5,000 USDT position, 0.0714 BTC at 70,000. With the example’s stop that loses about 155 USDT with fees, 1.55 times the 100 USDT you planned to risk, because the stop distance never entered the sum.
- A stop past the liquidation price. The exchange closes the position first and the stop never triggers. Before placing the order, compare the stop with the liquidation price on the order screen, which uses the exchange’s own tiers and mark price.
- Using cross margin. On cross margin the whole free balance backs every open position, so liquidation sits far away and moves as the balance and the other positions change. A position without a working stop can then lose far more than the margin it shows, and a loss on one position pulls the others closer to liquidation.
- Leaving out fees. Fees are charged on the notional, so they follow the size and are the same at 5x and at 50x. Sized without them, the example comes out at 0.04762 BTC and a stop-out costs about 103.28 USDT.
Where Finora fits
Finora is an AI trading assistant on Telegram: send it a symbol and timeframe and it fetches the chart itself, then replies with an entry zone, the targets in order and the invalidation level, leaving size and leverage to you. Put the stop a buffer beyond that level, size the trade in the position size calculator and check in the liquidation price calculator that liquidation sits well past the stop.
Related reading
- Position size calculatorHow many coins to trade so a stop-out costs what you planned.
- Liquidation price calculatorWhere an isolated long or short gets liquidated at your leverage.
- What is an invalidation level? Decide where you’re wrong firstAn invalidation level is the price that proves your trade idea wrong. How to find it, how your stop and size follow from it, and a worked 1h example.
- Crypto funding rates todayCurrent funding rates for liquid Binance USDT-M perpetuals: the highest and lowest rates, each contract’s payment interval and the next funding time.