When your isolated margin position is at risk, adding margin is like thickening a wall, pushing the liquidation line further away. Reducing your position is like lowering the height of the wall, directly shrinking your risk exposure. The effect and cost of moving the liquidation price are completely different.
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First, understand how liquidation is triggered so you know where to focus. On OKX, an isolated margin position will trigger forced reduction or liquidation when the margin ratio ≤ 100%. The margin ratio is calculated as position equity / (maintenance margin + forced reduction fee). Whether you add margin directly affects this formula.
Step 1: Check your current margin ratio and warning status
Don't wait for a red light to act. OKX's reduction warning triggers when the margin ratio ≤ 300%.
How to do it:
Open the isolated position details page and find the current margin ratio percentage.
Compare it to these ranges:
Above 300%: Safe zone, no immediate action needed.
≤ 300%: The system issues a reduction warning. Pay attention to the risk.
≤ 100%: The position triggers forced reduction. Your opposite orders will be canceled, and part or all of your position will be handed over to the liquidation engine.
Completion standard: You can identify which range your margin ratio falls into and know if you are in a warning state or about to be liquidated.
Common mistake: Many think "it's not at 100% yet so no rush," but the 300% warning line is your golden window. Once it drops below 100%, the system starts canceling orders and reducing positions automatically, and your room to act shrinks significantly.
Step 2: Evaluate how much adding margin can push your liquidation price away
Adding margin works directly: you add funds to your margin balance, and the liquidation price moves further away from the current market price.
How to do it:
Go to your isolated position page and click the " + " button next to the margin balance.
OKX allows you to add 10% to 100% of your trading account funds.
After entering the amount, the interface shows a new "estimated liquidation price" in real time.
Note: The exact calculation varies slightly between different trading pairs, but adding margin always pushes the liquidation price lower for long positions and higher for short positions.
Completion standard: You know the new liquidation price after adding margin and how much buffer it has from the current market price.
Step 3: Evaluate the impact of reducing your position on liquidation
Reducing your position works differently from adding margin – it directly lowers your risk exposure.
How to do it:
On the position page, select "Reduce Position" and enter the amount to close.
After entering the quantity, the interface will also show a new estimated liquidation price.
OKX's forced partial reduction mechanism: If your position is large (tier 2 or above), the system won't liquidate everything at once. Instead, it reduces the position step by step. For example, when the margin ratio falls below 100% and the position is at tier 3, the system first drops it by one tier, closing the corresponding amount. If the margin ratio is still ≤ 100%, it drops another tier, until the margin ratio goes above 100%. If already at tier 1, or even the lowest tier's maintenance margin ratio remains below 100%, the system will directly hand over the entire position to the liquidation engine at the bankruptcy price.
Completion standard: You know which tier your position is in and whether reducing it can bring the margin ratio back above the safe line.
Step 4: Choose based on your funds and position status
| Action | Effect | Cost | Best for |
|---|---|---|---|
| Adding margin | Pushes liquidation price further, keeps the position | Requires extra funds, which will be locked in the position | Your market direction view hasn't changed, just a temporary pullback, and you have spare funds |
| Reducing position | Lowers notional value, shrinks risk exposure | Gives up part of the position, locks in some losses | Not enough funds, or you think the market may move further against you |
Core logic: If you have spare funds and confidence in the direction, adding margin is a way to keep the position. If funds are tight or you don't want to bet further, reducing the position keeps risk control in your own hands rather than letting the system do it for you.
Risk reminder: The risk of an isolated margin position is independent and won't affect other positions or your cross margin account. But precisely because the risk is isolated, the system will not use margin from other positions to fill the gap – if you don't act proactively, it will still be liquidated when conditions are met.
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Verification after the operation
After completing the action, go back to the position details page and do three things:
Check the margin ratio: Is it back above 300% (warning line) or at least above 100% (liquidation line)?
Compare the liquidation price: Does the new liquidation price have enough buffer from the current market price (suggest at least 15%-20% room for fluctuation)?
Confirm the result: If you reduced the position, check that the position quantity has updated; if you added margin, check that the margin balance has increased.
Next step: After the operation, if the position is still large, consider setting a stop-loss order as a second line of defense. Next time you open a position in isolated mode, keep leverage within a reasonable range and leave enough room for error.
