What Is OKX Contract Maintenance Margin? When Will Liquidation Be Triggered?

Maintenance Margin Definition and Calculation

1. Maintenance margin is the minimum equity level required to keep an open perpetual contract position on OKX.

2. It is expressed as a percentage of the position’s notional value and varies by asset, leverage level, and position size.

3. OKX calculates maintenance margin dynamically using tiered margin rates — larger positions face higher thresholds to mitigate systemic risk.

4. For BTC/USDT perpetual contracts at 20x leverage, the base maintenance margin starts at 0.5%, rising to 1.2% for positions exceeding $5 million in notional value.

5. The formula applied is: Maintenance Margin = Notional Value × Tiered Maintenance Rate.

Mark Price vs. Index Price Mechanics

1. OKX uses a mark price derived from index price plus bid-ask spread adjustments to prevent manipulation-induced liquidations.

2. The index price aggregates real-time spot data from six major exchanges, smoothed with a ±5% deviation filter — stricter than Binance’s ±2%.

3. This wider smoothing window increases sensitivity during volatility spikes, causing faster mark price divergence from last traded price.

4. When the mark price breaches the liquidation price, the system initiates auto-deleveraging or partial liquidation without requiring user confirmation.

5. Liquidation is triggered solely when equity falls below maintenance margin, not when balance hits zero.

Liquidation Triggers and Execution Sequence

1. Liquidation begins the moment account equity drops below the calculated maintenance margin requirement.

2. OKX executes immediate partial closure if the position exceeds 80% of max allowable size for its tier — no grace period is granted.

3. A forced liquidation fee of 0.02% is deducted from remaining equity before settlement, applied uniformly across all perpetual pairs.

4. If multiple positions exist, OKX prioritizes liquidation of the highest-risk position based on unrealized PnL volatility over the prior 60 minutes.

5. No manual override or margin call warning is issued — execution is fully automated and irreversible.

Auto-Deleveraging Protocol Activation

1. When insolvency risk emerges — such as during flash crashes where mark price gaps beyond insurance fund coverage — OKX activates ADL.

2. ADL targets profitable counterparties with the highest leverage and longest holding duration, starting from the most recent profitable trade.

3. The protocol applies a fixed 0.05% reduction to the counterparty’s unrealized PnL per ADL cycle, continuing until solvency is restored.

4. Positions subject to ADL receive no notification; the adjustment appears as an instantaneous PnL correction in the transaction history.

5. ADL only engages after full depletion of the insurance fund — it is not a preventive measure but a final risk containment layer.

Frequently Asked Questions

Q1: Does OKX adjust maintenance margin rates during weekends or holidays?OKX does not alter tiered maintenance margin parameters based on time-of-week or market closure status. Rates remain active 24/7 and respond exclusively to real-time position sizing and price action.

Q2: Can I view my current maintenance margin threshold before opening a position?Yes. The OKX trading interface displays live maintenance margin requirements beneath the order entry panel once leverage and size are selected. Values update dynamically with each price tick.

Q3: Is maintenance margin recalculated after adding margin to an existing position?Yes. Any margin top-up triggers immediate recalculation using updated equity and current mark price. The new threshold reflects the revised position size and prevailing volatility conditions.

Q4: Do isolated and cross-margin modes use identical maintenance margin formulas?No. Isolated margin applies asset-specific tiered rates. Cross-margin uses portfolio-wide equity and a unified rate schedule tied to total exposure across all open positions.