Adding margin gives you one clear benefit: your liquidation price moves in a more favorable direction. Simply put, margin acts as a safety cushion for your position — the thicker the cushion, the less likely a price swing will trigger liquidation.
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Step 1: Know Your Position Mode — Isolated vs Cross Margin
Where you add margin and how it works depends entirely on whether you are using isolated margin or cross margin. Check your current position mode first — it determines what you need to do.
Case A: Isolated Margin Mode. In this mode, each position has its own separate margin. Find the position you want to top up, then click the "+" button next to the margin balance in the position area. Enter the amount you want to add. The liquidation price for that position will update immediately.
Case B: Cross Margin Mode. In cross margin, there is no separate "add" button for individual positions because your entire account balance acts as shared margin. What you need to do is transfer funds from your funding account to your trading account. Once transferred, the total margin pool increases, and the liquidation risk for all positions goes down accordingly.
Common mistake to avoid: Many users in isolated mode accidentally tap the "Adjust Leverage" button next to their position instead of adding margin. These two actions are completely different — adding margin means putting in more funds to reduce liquidation risk, while raising leverage means reducing the required margin to free up capital, but it increases your risk exposure.
Step 2: Calculate How Your Liquidation Price Will Change Before Adding
Before you act, it helps to know: how much will my liquidation price move if I add a certain amount of margin?
OKX has a built-in contract calculator that can do this for you.
How to find it: On the contract trading page, tap the "..." menu in the top right corner, then select [Calculator] → [Liquidation Price].
What to enter: Pick your trading pair, position mode (isolated/cross), and direction (long/short). Then enter your current leverage, average entry price, and position size. The most important step — enter the amount you plan to add in the "Additional Margin" field and hit calculate.
You will then see an estimated value of what your liquidation price will become after adding that margin.
Key reminder: Liquidation is based on the mark price. OKX triggers liquidations using the mark price, not the last traded price you see on the chart. The mark price helps smooth out unusual market spikes. But this also means that even if the last price on your screen hasn't reached your liquidation line, once the mark price hits it, the liquidation process will still be triggered.
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Step 3: Decide Whether to Add Margin or Reduce Position Based on Your Risk Level
If your liquidation price is getting dangerously close to the current market price, you have two options: add margin (push the liquidation price further away) or manually reduce your position (shrink your risk exposure).
Adding margin: This gives you more breathing room without changing your position size. It works well if you still believe in the long-term direction but are just facing short-term volatility.
Manually reducing position: Close part of your position to directly lower your risk. This instantly pushes the liquidation price much further away from the current market price. It is the quickest way to cut risk. This is a better choice when you think your directional call might be wrong or you don't want to commit more funds to this trade.
High-risk alert: Partial liquidation — liquidation doesn't mean losing everything at once. OKX uses a partial liquidation mechanism. When your maintenance margin ratio falls below the required level, the system will first automatically reduce a portion of your position rather than closing the entire position in one go. If the risk ratio still isn't back to a safe level after that reduction, the system will continue trimming your position in cycles until it is. Understanding this is important — it means you still have a chance to save the remaining part of your position by adding margin after a partial liquidation occurs.
How to verify your action worked: Right after adding margin, go back to your [Positions] list and check whether the number under "Liquidation Price" has moved further away from the current market price. If it hasn't changed, or the change is barely noticeable, the amount you added may not have been enough to make a meaningful difference to your risk level. In that case, consider adding more margin or reducing your position size.
