Definition 
The largest percentage loss you incurred on a single closed trade.

Formula

• Stocks: Biggest % Loser = (Loss on Trade / Investment on Trade) * 100
• Forex: Biggest % Loser = (Loss on Trade / Account Balance Prior to Trade) * 100

Examples
Stocks Example:

• Investment: $1500
• Loss: -$450
• Biggest % Loser: (-$450 / $1500) * 100 =- 30%

Forex Example:

• Account Balance Prior to Trade: $8000
• Loss: -$500
• Biggest % Loser: (-$500 / $8000) * 100 = -6.25%

Key Points

• Risk Identification: Helps you identify trades with disproportionately large losses in terms of percentage.

Considerations

• Investment vs. Account Balance: The percentage loss calculation differs for traditional investments vs. forex trading:
• Traditional Investments: Percentage loss is calculated based on the trade’s specific investment.
• Forex: Percentage loss is often calculated based on the overall account balance before the trade took place.