isolated margin and cross margin are the two ways a perp protocol can underwrite your positions. with isolated margin, each position has its own ring-fenced collateral, and a liquidation only consumes that specific chunk. with cross margin, every position shares your entire free balance as backstop, so a winning trade can keep a losing trade alive. they are different risk philosophies, and choosing the wrong one is how good traders take bad blowups.
in plain english
isolated margin is "this rip has 50 dollars on it and 50 dollars is all i can lose on it." cross margin is "this rip can borrow from any of my other dollars to stay alive." isolated caps the downside per trade. cross lets one trade drain everything if you stop paying attention.
when to use isolated margin
isolated is the right pick for high-leverage, arcade-style, short-horizon trades. the entire point is to box the risk into a known number before you tap.
- rip-style entries where you want max known downside.
- experiments with new pairs you do not have conviction on.
- multi-position setups where one bad trade should not eat the others.
- most retail use cases, honestly.
when to use cross margin
cross is the right pick for portfolio-style trading where positions are intentionally correlated and you want capital efficiency.
- hedged pair trades where one side's gain offsets the other's loss.
- larger directional positions where you want every dollar in the account defending the trade.
- market makers and quant strategies that need pooled margin to run efficiently.
how it shows up on uponly.win
uponly rips are isolated by design. when you choose a collateral size and tap rip, exactly that amount is committed to the trade and exactly that amount is the maximum you can lose on it. the rest of your in-app balance is safe for the next rip. this is intentional: the arcade model only works if every rip has a hard, known downside. for the philosophy behind that design, see how uponly was built in one night.
common confusions
people often think cross margin is "safer" because positions can survive longer. that is half-true and dangerously misleading. cross extends the life of any single position, but it also enlarges the loss when liquidation finally happens, because more capital is at stake. isolated is "safer" per position. cross is "more capital-efficient" per dollar in the account. those are different goals.
- isolated: known max loss per position, no cross-contamination.
- cross: shared backstop, higher capital efficiency, larger blast radius.
- most beginners should start isolated and only switch when they have a reason.
- some venues default to cross; always check before opening size.
see also
- margin definition
- leverage definition
- liquidation price definition
- long vs short position
- mark price vs index price
if you want the cleanest possible "i can only lose this much" experience, that is exactly the uponly default. open uponly and try a small isolated rip.