Formula & Calculator
Margin Ratio (Perpetual Futures)
Measures the safety buffer of a leveraged position by comparing account equity to the total notional value of open positions.
Interpretation
Margin Ratio (%) = (Account Equity / Position Notional Value) × 100. The percentage of position value covered by margin. Used to manage leverage risk.
Variables
| Symbol | Quantity | Unit |
|---|---|---|
| Margin Ratio | Margin ratio | % |
| Account Equity | Current account equity (margin + unrealized PnL) | currency |
| Position Notional Value | Total notional value of open positions | currency |
What it means
The margin ratio indicates the level of leverage. A lower margin ratio means higher leverage and higher risk. It is used to monitor positions and to avoid liquidation. Understanding this helps traders manage their leverage and to maintain sufficient margin to avoid forced closures.
Worked example
Margin Ratio – Two Detailed Examples
Real‑World| Parameter | Value |
|---|---|
| Account Equity | $2,000 |
| Position Notional Value | $20,000 |
| Parameter | Value |
|---|---|
| Equity | $5,000 |
| Position | $20,000 |
Common mistakes
- Margin ratio: Account equity divided by position notional value.
- Account equity: Collateral + unrealised PnL.
- Position notional: The total value of the position.
- Liquidation: If margin ratio falls below maintenance margin, liquidation occurs.
Applications
Margin ratio (perpetual futures) compares account equity to the position notional value, indicating the level of leverage and the risk of liquidation. Traders use it to monitor their margin health and to avoid forced liquidation. By maintaining a healthy margin ratio, they can avoid losing their collateral. This metric is essential for leveraged trading.
- Monitoring the health of leveraged positions
- Adjusting position size to maintain adequate margin
- Preventing liquidation by adding margin or reducing size
- Assessing the risk of a trading strategy
- Educational understanding of margin and leverage
Frequently Asked Questions
Margin Ratio = (Account Equity / Position Notional Value) × 100. For example, if your equity is $2,000 and your position is $20,000, the ratio is 10%. A higher ratio means more safety.
It varies by leverage and exchange. For 10x leverage, maintenance margin is often around 2-5%. For 50x, it may be 1-2%. Always check the exchange's specifications.
Liquidation occurs. The exchange will forcibly close your position to prevent further losses. You will lose the entire margin and possibly face a penalty.
You can add more margin to your position, reduce your position size, or place a stop-loss to limit losses. All these actions increase the ratio.
Yes, equity includes your initial margin plus or minus unrealized PnL. As PnL moves, the margin ratio changes dynamically.
It updates in real-time as the underlying price moves. You can see it change continuously on your trading dashboard.
Initial margin is the amount required to open a position. Maintenance margin is the minimum required to keep it open. Maintenance margin is lower than initial margin.
Yes, many traders set a personal threshold (e.g., 50% of maintenance) to close positions early before liquidation. This is a good risk management practice.