Direct Answer
Risk of ruin is the probability that a trader will lose enough capital to be unable to continue trading, usually due to excessive risk or a prolonged losing streak.In Simple Terms
Risk of ruin measures the chance that your account will drop so much that recovery becomes impossible.Quick Breakdown
- Probability of blowing up an account
- Influenced by risk per trade
- Affected by win rate and drawdowns
- Higher risk = higher chance of ruin
Why Risk of Ruin Matters
Every trading system experiences losing streaks. The key question is:Can your account survive them?If risk is too high, even a system with a positive edge can fail before it has time to recover.
What Increases Risk of Ruin
Several factors raise the probability of ruin:- Risking too much per trade
- Low win rate
- Large drawdowns
- Inconsistent position sizing
The Role of Losing Streaks
Losing streaks are not rare—they are expected. Even with a solid system:- 5–10 consecutive losses can occur
- Sometimes more
Example
Account: $10,000 If you risk:- 1% per trade → manageable decline
- 5% per trade → rapid drawdown
- 10% per trade → high probability of ruin
The Compounding Effect of Losses
Losses reduce your base capital. Examples:- -10% → requires +11% to recover
- -30% → requires +43%
- -50% → requires +100%
How to Reduce Risk of Ruin
- Lower risk per trade
- Use consistent position sizing
- Avoid emotional decisions
- Focus on long-term survival
Key Insight
A profitable system can still fail if risk is too high.Survival is the first requirement of success in trading.