Ruin Probability & Drawdown Guard
Guard your capital against catastrophic loss.
Overview
This pillar analyzes your personal trading strategy to calculate the statistical risk of losing your entire bankroll. It provides a defensive framework for long-term survival and profitability in any prediction market.
What It Does
Using your historical win rate, average profit, and average loss, this pillar runs thousands of simulations to model potential future outcomes. It calculates the 'Risk of Ruin', the probability of your account hitting zero, and projects your 'Maximum Drawdown', the largest likely drop from a peak balance. This quantifies the inherent risk in your current strategy.
Why It Matters
Even a winning strategy can fail if risk is not managed properly. This pillar provides a crucial defensive edge by revealing the breaking points of your system, allowing you to adjust bet sizing and avoid taking on existential risk. It turns trading from a gamble into a calculated, sustainable process.
How It Works
First, you input your core trading metrics: win percentage, average win size, and average loss size. The model then uses a Monte Carlo simulation to run thousands of hypothetical trading sequences based on these inputs. Finally, it aggregates the results to determine the percentage of sequences that ended in ruin and the worst-case drawdown experienced.
Methodology
The core calculation is the Risk of Ruin (RoR), derived from Monte Carlo simulations or formulas like RoR = ((1 - Edge) / (1 + Edge)) ^ Capital_Units. Maximum Drawdown is calculated as the greatest percentage decline from a peak to a subsequent trough across all simulations. The model assumes a static strategy; changes in performance require recalculation.
Edge & Advantage
This pillar provides a survival edge by preventing the single most common failure: improper position sizing that wipes out an otherwise profitable trader during a losing streak.
Key Indicators
-
Risk of Ruin %
highThe statistical probability of losing your entire trading capital based on your current strategy.
-
Max Drawdown Limit
highThe maximum acceptable peak-to-trough decline in your bankroll before you must stop and re-evaluate.
-
Recovery Multiplier
mediumThe percentage gain required to recover from a specific drawdown, which grows exponentially with the loss.
Data Sources
-
User Trading History
Your personal record of trades, which provides the necessary inputs like win rate, average profit, and average loss.
Example Questions This Pillar Answers
- → What is the maximum percentage of my bankroll I should risk per trade to keep my ruin probability below 1%?
- → Based on my past performance, what is the largest drawdown I can realistically expect to face in the next 100 trades?
- → If I have a 55% win rate, how does changing my risk per trade from 2% to 5% affect my long-term survival odds?
Tags
Use Ruin Probability & Drawdown Guard on a real market
Run this analytical framework on any Polymarket or Kalshi event contract.
Try PillarLab