🔗 How to Calculate True Risk When Trading Correlated Pairs

🔗 How to Calculate True Risk When Trading Correlated Pairs

23 November 2025, 11:47
Issam Kassas
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🔗 How to Calculate True Risk When Trading Correlated Pairs

🎯 The Lesson

Most traders think each trade has its own risk.
But when pairs move together — EURUSD, GBPUSD, XAUUSD, NAS100 —
your “separate trades” become one big exposure to the same direction.
If you don’t calculate true correlated risk, a single move can wipe out half your account.

⚙️ Step 1: Understand Positive and Negative Correlation

Positive correlation → pairs move in the same direction.
Example:

  • EURUSD ↑

  • GBPUSD ↑

  • XAUUSD ↑

These are USD-weakness trades.
Open all three?
You’re basically opening three versions of the same trade.

Negative correlation → pairs move in opposite directions.
Example:

  • EURUSD ↑

  • USDJPY ↓

Both represent USD weakness — the direction is the same, but movement is opposite visually.

If you buy EURUSD and buy USDJPY together, you’re actually contradicting yourself.


📊 Step 2: Calculate Total Risk Across Correlated Pairs

If you risk 2% per trade and open:

  • EURUSD buy → 2%

  • GBPUSD buy → 2%

  • XAUUSD buy → 2%

True risk is not 2% per trade.
It’s:
👉 2% + 2% + 2% = 6% exposure to USD weakness

If USD strengthens unexpectedly, you will likely lose all 3 trades at once.

This is how accounts disappear without “doing anything wrong.”


🧮 Step 3: Use the Correlation Table Rule

Before opening multiple trades, check correlation:

Pair Combination Correlation Risk Rule
EURUSD & GBPUSD High + Count as one trade
XAUUSD & GBPUSD Med + Risk × 1.5
EURUSD & USDJPY High – Count as two trades
NAS100 & XAUUSD Med – Use half size

If correlation is:

  • Above +0.75 → treat them as one trade

  • Between +0.50 and +0.75 → treat as 1.5× risk

  • Below +0.50 → independent


🔢 Step 4: Apply the “Max Exposure Rule”

Your total correlated exposure should never exceed:
👉 6% of your account

Example:
If EURUSD, GBPUSD, and AUDUSD all show USD weakness →
open only one or two trades total, not all three.

Professionals keep maximum correlated exposure under 4%–6% to avoid cluster losses.


💡 Step 5: Reduce Size, Not Opportunities

If you want to take multiple correlated trades, simply shrink position size.

Example:
Instead of:

  • 3 trades × 2% risk = 6% total
    Do:

  • 3 trades × 0.7% risk = 2.1% total

Same opportunity
→ lower danger
→ smoother equity curve
→ easier recovery


🚀 Takeaway

A trader with three correlated trades is not “diversifying.”
They’re multiplying risk without knowing it.

When you calculate true correlated exposure, you stop blowing accounts during trends you didn’t expect.
Control correlation — and you control your entire portfolio.


📢 Join my MQL5 channel for more trading & risk-management insights:
👉 https://www.mql5.com/en/channels/issam_kassas