What is a Worked Example of Pair Specific Leverage?

Worked example: pair specific leverage in numbers

Pair specific leverage means that the maximum leverage (and often the effective margin requirement) is not the same for every currency pair. Instead, a provider may apply different leverage limits per pair (and sometimes per account type, order size, or product specifications). This affects how much margin is tied up for a given position size, which in turn affects how quickly a position can reach margin stress if prices move.

Below is one worked example using only fixed assumptions (no live prices). Because providers can set different rules, the example is meant to show the mechanics, not to predict real outcomes.

Mechanism and definition (what inputs matter)

To make pair specific leverage concrete, separate stable mechanics from variable conditions.

Stable mechanics (math you can verify):

• Contract size / units: How many base-currency units one “lot” represents.
• Position notional: The quote value you are effectively exposed to.
• Leverage: A rule that connects notional exposure to required margin.
• Margin requirement: The portion of account equity held to support the position.

A simple way to express leverage mechanics is:

• Required margin = Position notional ÷ Leverage

Variable provider or market conditions (you must check independently):

• The provider’s pair-specific leverage limit for the exact pair.
• Whether leverage changes with order size tiers.
• Fees/spreads/financing assumptions, which affect equity but are not part of leverage itself.

Worked numerical example (state every assumption)

Assume a retail account with the following fixed assumptions:

1. Account currency is USD.
2. We open two positions of the same notional size so the only difference is leverage by pair.
3. Position notional for both positions is $20,000.
4. The provider applies pair-specific maximum leverage:
   • Pair A leverage: 5:1
   • Pair B leverage: 10:1
5. Ignore fees, spreads, and financing for the first step (because they vary and the goal is to isolate leverage mechanics).

Step 1: Compute required margin from leverage

• For Pair A (5:1):
  • Required margin = $20,000 ÷ 5 = $4,000
• For Pair B (10:1):
  • Required margin = $20,000 ÷ 10 = $2,000

Result: With the same $20,000 notional, Pair A ties up twice as much margin as Pair B.

Step 2: Show the same price move creates different margin stress

Now assume (for illustration) that both pairs move in the same percentage direction relative to notional, and that the profit/loss on the position is tied to that move.

Assume a price move causes -2% loss on notional for both positions.

• Loss = 2% of $20,000 = -$400

Assume initial equity equals available margin plus any free buffer. To keep it simple, set initial equity to the margin requirement plus an identical buffer:

• Buffer = $1,000
• Equity for Pair A scenario = $4,000 + $1,000 = $5,000
• Equity for Pair B scenario = $2,000 + $1,000 = $3,000

After the -$400 move:

• Equity Pair A = $5,000 - $400 = $4,600
• Equity Pair B = $3,000 - $400 = $2,600

Even though the dollar loss is the same, Pair A started with more margin locked, leaving a larger remaining equity base in absolute terms. The key practical point is that leverage changes how quickly equity can become insufficient relative to margin requirements if prices move further.

Limitations and risks (material failure modes)

This example intentionally leaves out moving parts that can change real outcomes. Common limitations include:

1. Margin math depends on provider rules: Your provider may calculate margin using more than the simple notional ÷ leverage formula, such as tiers, risk add-ons, or different contract specifications.
2. Equity is not only price-driven: Spreads, commissions, and financing can reduce equity before or during a price move.
3. Contract size and conversion details matter: If the position size is specified in lots, the notional in USD must be computed correctly using the contract definition.
4. Margin calls and liquidation thresholds vary: Providers may use different trigger levels (e.g., stop-out logic) that are not captured here.

Because of these factors, this is not a prediction. It is a mechanical demonstration of how different pair leverage limits change required margin for the same notional.