Correlation and Dependency in Trades

Hidden Risk in Correlated Positions

One of the less obvious sources of risk in trading is correlation — the tendency of multiple positions to move together, effectively making your total risk larger than the sum of individual trade risks.

How Correlation Creates Hidden Risk

If you simultaneously hold:

• Long NQ (NASDAQ futures)
• Long QQQ (NASDAQ ETF)
• Long AAPL stock

These positions are highly correlated. If the tech sector sells off, all three positions lose simultaneously.

If you risk 1% per trade, you might think you're risking 3%. In reality, because of correlation, you might effectively be risking 3× 1% = 3% — but all in the same direction. One adverse macro event hits all three.

Asset Class Correlations to Know

Highly correlated (move together):

• NQ and QQQ
• ES and SPY
• EUR/USD and GBP/USD
• Gold and silver
• Crude oil and energy stocks

Inverse correlations (move opposite):

• Long bonds and stocks (usually, not always)
• USD and gold
• VIX and S&P 500

Low correlation:

• Equity indexes and yen
• Crude oil and tech stocks
• Gold and equities (during normal markets)

Managing Correlation Risk in Tradapt

Tag correlated position groups. When reviewing a trading day, add up your total risk across correlated instruments — not just per-trade risk.

Practical rule: If the total directional risk in correlated instruments exceeds 3% of your account (for a 1% risk system), you're effectively taking a concentrated position — even if each trade individually looks conservative.

Trade Dependency

A related concept: trade dependency refers to whether your trade outcomes are correlated with each other. In theory, each trade outcome should be independent. In practice, several factors create dependency:

• Same market, same day: If you're trading the same instrument multiple times in a session, your trade outcomes are correlated through the underlying market behavior
• Consecutive trades after a loss: Revenge trading creates behavioral dependency — your second trade's outcome is partially influenced by your emotional state from the first

Understanding these dependencies helps calibrate how much confidence to place in your streak statistics.