Isolated margin trading is a popular method that allows traders to isolate their risk to a specific position. By allocating a limited amount of collateral to a single trade, investors can manage their exposure more precisely. This guide explains the core rules, calculations, and risk management practices for isolated margin trading across various products.
Understanding Isolated Margin Trading
Isolated margin involves dedicating a specific amount of collateral to a single position. This means the potential loss is limited to that allocated margin, protecting the rest of your account balance. The system performs checks before order placement to ensure sufficient funds are available.
In contract mode, your available balance for the specific coin must be greater than or equal to the amount required for the order. In cross-margin mode, your overall effective margin must cover the allocated margin including the pending order, and the available balance of the specific coin must meet the required collateral. Portfolio margin mode follows a similar logic, requiring sufficient overall effective margin and coin-specific available balance.
Isolated Margin Trading for Leverage
Leverage trading allows you to borrow funds to amplify your trading position. Key concepts include position assets, liabilities, margin, entry price, estimated liquidation price, and unrealized profit and loss (P&L).
Key Components of a Leverage Position
- Position Assets: The quantity of the asset held, net of fees.
- Liabilities: The total borrowed amount, including interest.
- Margin: The collateral allocated to the position.
- Entry Price: The average price at which the position was opened.
- Estimated Liquidation Price: The price at which your position is at risk of being automatically closed.
- Unrealized P&L (UPL): The current profit or loss on the open position.
- UPL Ratio: The unrealized P&L expressed as a percentage of the initial margin.
The formulas for calculating liquidation price and unrealized P&L differ based on whether the trade or quote currency is used as collateral and if you are in the new or old isolated margin mode.
Opening a Leverage Position
When you open a position, assets, liabilities, and margin are all reflected. The display varies depending on your account mode.
Example: Opening a 10x Long or Short on BTC at $100,000
| Position Type | Trade Currency as Collateral | Quote Currency as Collateral |
|---|---|---|
| Long | Old Mode: Assets=1.1 BTC, Liab=-100k USDT, Margin=0.1 BTC New Mode: Assets=1 BTC, Liab=-100k USDT, Margin=0.1 BTC | Assets=1 BTC, Liab=-100k USDT, Margin=10,000 USDT |
| Short | Assets=100k USDT, Liab=-1 BTC, Margin=0.1 BTC | Old Mode: Assets=110k USDT, Liab=-1 BTC, Margin=10k USDT New Mode: Assets=100k USDT, Liab=-1 BTC, Margin=10,000 USDT |
Closing a Leverage Position
Closing a position involves repaying the borrowed amount and selling the acquired assets. The process depends on your collateral type.
- Long Position (Trade Currency Collateral): Repay the quote currency liability.
- Long Position (Quote Currency Collateral): Sell the trade currency asset. Any remaining liability after selling the asset is deducted from the margin.
- Short Position (Trade Currency Collateral): Sell the quote currency asset. Any remaining liability is deducted from the margin.
- Short Position (Quote Currency Collateral): Repay the trade currency liability.
Different order types facilitate closing:
- Market Close-All Order: The system automatically calculates and executes the order to close the entire position, returning any remaining funds to your account balance.
- Market/Limit Order: You manually specify the order to close the position, following the same principles as the system's close-all function.
- Reduce-Only Order: This order will only execute if it reduces your position size, preventing accidental increases.
- Non-Reduce-Only Order: If this order closes your existing position and has remaining volume, it will open a new position in the opposite direction, requiring additional margin from your account balance.
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Isolated Margin for Perpetual and Futures Contracts
Isolated margin trading is available for both perpetual swaps and delivery futures. Two position modes are supported: bidirectional (hedge mode) and unidirectional (one-way mode).
Key Metrics for Contracts
- Position Quantity: Positive for long positions, negative for short positions (unidirectional mode).
- Closeable Quantity: The amount available to close, shown only in bidirectional mode.
- Profit and Loss (P&L): The unrealized gain or loss on the position, calculated differently for coin-margined and USDT-margined contracts.
- P&L Ratio: The P&L as a percentage of the initial margin.
- Estimated Liquidation Price: The price level that would trigger liquidation.
- Margin Balance: The initial margin plus any manually added or reduced margin.
- Maintenance Margin: The minimum margin required to keep the position open.
- Maintenance Margin Rate: A ratio indicating how close your position is to liquidation. It is calculated as (Margin Balance + UPL) / (Position Value * (Maintenance Rate + Fee Rate)).
Isolated Margin for Options Trading
Options trading with isolated margin introduces its own set of metrics for buyers and sellers.
Key Metrics for Options
- Position Quantity: Positive for long (bought) positions, negative for short (sold) positions.
- Current Market Value: The present value of the options holding.
- Profit and Loss (P&L): The unrealized gain or loss.
- P&L Ratio: Calculated as (Mark Price - Avg Entry Price) / Avg Entry Price for buyers, and the inverse for sellers.
- Margin Balance: The initial margin plus any manual adjustments.
- Maintenance Margin: The minimum margin required for sellers (buyers have a maintenance margin of 0).
- Maintenance Margin Rate: The ratio of Margin Balance to (Maintenance Margin + closing fees), crucial for risk management.
Risk Management and Liquidation
A core principle of isolated margin is that risk is contained within each position. However, understanding the liquidation process is critical.
The Maintenance Margin Rate is the primary risk indicator. If it falls below 100%, the position is under-collateralized and at risk of liquidation.
The Liquidation Process
- Early Warning (at 300%): The system issues a warning when the Maintenance Margin Rate drops below 300%, alerting you to consider reducing your position.
- Order Cancellation (at <=100%): If the rate falls to 100% or below, all pending orders for that position are canceled.
Partial Reduction or Full Liquidation: After order cancellation, the system checks the rate again.
- If it's above 100%, the account returns to normal.
- If it remains at or below 100%, forced liquidation begins.
Forced liquidation is not always all-or-nothing:
- Partial Reduction (Leverage/Contracts): For larger positions in higher tiers, the system may only liquidate enough of the position to drop it down one or two risk tiers, rather than closing it entirely immediately.
- Full Liquidation: For smaller positions or if partial reduction doesn't fix the margin issue, the entire position is liquidated at the bankruptcy price (the price where the allocated margin is entirely lost).
Any remaining positive balance in the isolated margin account after liquidation is returned to your main account balance.
Frequently Asked Questions
What is the main advantage of isolated margin?
Isolated margin allows you to limit your risk to a predefined amount of capital allocated to a single trade. If that trade moves against you, only the isolated collateral is lost, protecting the rest of your portfolio.
How is the liquidation price calculated?
The liquidation price is calculated using a formula that considers your position size, entry price, allocated margin, the maintenance margin rate, and trading fees. It differs for leverage, perpetual/futures, and options, and also depends on your collateral currency.
What happens if my maintenance margin rate falls below 100%?
When your maintenance margin rate hits 100%, all open orders for that position are canceled. If the rate remains at or below 100% after order cancellation, the platform will begin forced liquidation of your position, either partially or fully.
Can I add more margin to an isolated position to avoid liquidation?
Yes, most platforms allow you to manually add more funds to your isolated margin balance for a specific position. This increases your maintenance margin rate and can help avoid a liquidation trigger.
What is the difference between isolated and cross margin?
In cross margin, your entire account balance is used as collateral for all positions. This can prevent liquidation on one position if others are profitable, but it also risks your entire account on a single bad trade. Isolated margin contains the risk.
Is isolated margin suitable for beginners?
Isolated margin is often recommended for beginners because it clearly defines and limits potential losses on each trade, making risk management more straightforward compared to cross margin.