Profit Factor

Profit factor is one of the most widely used metrics for evaluating trading strategy performance. It's calculated by dividing total gross profits by total gross losses.

Formula

Profit Factor = Gross Profit / Gross Loss

Interpreting Profit Factor

| Profit Factor | Interpretation |

|--------------|----------------|

| < 1.0 | Losing strategy |

| 1.0 | Break-even |

| 1.0 – 1.5 | Marginal edge |

| 1.5 – 2.0 | Good strategy |

| 2.0 – 3.0 | Excellent strategy |

| > 3.0 | Exceptional (or small sample) |

Example

• 100 trades total
• 60 winners totaling $15,000
• 40 losers totaling $9,000
• Profit Factor = $15,000 / $9,000 = 1.67

For every $1 lost, you made $1.67.

Why It Matters for Prop Trading

• A profit factor above 1.5 during evaluation suggests a real edge
• Firms may use profit factor as part of their scaling criteria
• PropTally calculates your profit factor automatically across all accounts

Limitations

• Doesn't account for trade frequency or time period
• Can be skewed by a single large winning trade
• Should be evaluated alongside win rate, average R:R, and sample size

Improving Your Profit Factor

1. Cut losing trades faster (reduce average loss)
2. Let winners run longer (increase average win)
3. Be more selective about trade entries (improve win rate)
4. Avoid revenge trading (eliminates emotional losses)