1. Trading Rules for Spot and Futures Cross Margin Mode
When trading in spot and futures cross margin mode, margin positions display key metrics:
| Term | Explanation |
|---|---|
| Assets | Positive assets in the position (excluding margin). |
| Available Asset | Positive assets available to close a position (see details below). |
| Liability | Initial liabilities + accrued interest. |
| Interest | Generated interest not yet deducted. |
| Avg. Open Price | Weighted average of original and new holdings. |
| Est. Liquidation Price | Indicative price when liquidation conditions are met (exceptions apply). |
| P&L | Unrealized profit/loss, calculated differently for long/short positions. |
| P&L Ratio | P&L divided by initial margin. |
| Initial Margin | Calculated based on position type and margin currency. |
| Maintenance Margin | Minimum required margin to prevent liquidation. |
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2. Initial Margin Principles
Key principles of initial margin in cross margin mode:
- Both pair tokens can serve as margin
Examples:
- For BTC/USDT: Choose BTC or USDT as margin currency
- Long position example: 1BTC at 10X leverage requires 0.1BTC margin
- Margin remains in account balance (unlike isolated positions)
3. Position Closing Mechanisms
3.1 Matching Position and Margin Currencies
Closing Principles:
- Only available assets can close positions
- Formulas differ based on equity vs. margin requirements
| Scenario | Available Asset Calculation |
|---|---|
| Long Positions | (Liability + interest) × (1 + IMR/MMR%) ÷ mark price |
| Short Positions | (Liability + interest) × (1 + IMR/MMR%) × mark price |
Closing Methods:
| Method | Rules |
|---|---|
| Market Close All | Pays liabilities, transfers remaining assets to account |
| Limit Close | Allows partial closing with remaining liability |
| Reduce + Reverse | Closes position, uses excess to open opposite position |
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3.2 Mismatched Position and Margin Currencies
Key Differences:
- Only position assets can close positions
- Entire position must be sold to close
- Account equity covers unpaid liabilities
FAQ Section
Q: How is liquidation price calculated in cross margin mode?
A: It's estimated based on position metrics, but cannot be calculated with options or mixed underlying positions.
Q: Can I change margin currency after opening a position?
A: No, margin currency is fixed when opening the position.
Q: What happens if I partially close a position?
A: Remaining liability stays until fully paid from account equity.
Q: How is interest calculated on positions?
A: Interest accrues continuously until deducted from position value.
Q: What's the main advantage of cross margin vs isolated?
A: Cross margin allows shared equity across positions, providing more flexibility.
Q: Can I use cross margin for all trading pairs?
A: Availability depends on the exchange's supported margin pairs.