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Check out the new article: Building a Profitable Trading System (Part 1): A Quantitative Approach.
Many traders evaluate strategies based on short-term performance, often abandoning profitable systems too early. Long-term profitability, however, depends on positive expectancy through optimized win rate and risk-reward ratio, along with disciplined position sizing. These principles can be validated using Monte Carlo simulation in Python with back-tested metrics to assess whether a strategy is robust or likely to fail over time.
A consistently profitable trading system relies on the interplay of three core pillars:
These three variables are fundamental drivers of key performance metrics such as profit factor, recovery factor, and drawdowns. However, many traders make the mistake of focusing almost exclusively on win rate, overlooking the critical importance of RRR and position sizing when evaluating the effectiveness of their (automated) trading systems.
To succeed eventually and remain active in the markets, traders must understand the dynamics of their trading edge—specifically its win rate, RRR, and the optimal position size that corresponds to those two metrics.
This article is designed to help traders evaluate their strategies over the long term by incorporating statistical results from back-testing into a Monte Carlo simulation. This approach generates a wide range of possible outcomes and provides an added layer of confidence—helping the trader determine whether a system should be continued, improved, or discarded.
Author: Daniel Opoku