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Your Strategy Tester report gives you a Sharpe ratio and you feel good about it. But here's the question nobody's report answers: is that number real, or did you just get lucky with a short sample? Bailey and Lopez de Prado proposed the Probabilistic Sharpe Ratio (PSR) for exactly this case. Given your actual sample size and returns that rarely fit a textbook bell curve, PSR estimates the probability that your true edge beats some benchmark SR*. Minimum Track Record Length (MinTRL) is the

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Part 4 of this series extracted the divergence logic into DivergenceEngine.mqh and demonstrated it in a small Adaptive Parabolic SAR EA. That article closed by pointing at something the demonstration had deliberately left alone. In most systems, Parabolic SAR is a trailing-stop tool rather than an entry trigger, and the same adaptive acceleration factor can be used to tighten or loosen a trailing stop on an already-open position from an Expert Advisor that knows nothing about this series.

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Testing this hypothesis on the quotes of financial instruments can provide valuable information to analysts who develop trading systems based on detecting statistically significant deviations from the efficient market hypothesis. This article examines how to test the randomness hypothesis using the chi-square method. This is a versatile and well-studied method that can be used to test various statistical hypotheses; it is based on comparing the observed and expected frequencies of events.

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A mutation is a significant change in the EA’s market fingerprint, flagged when the cosine or normalized L2 distance between the previous and current DNAMetrics exceeds the set thresholds—and usually means a regime shift (e.g., ATR, spikes, session dominance, or retracement behavior changed). Treat it as an early warning: inspect which metrics moved, tighten or pause execution (smaller size, wider ATR stops, higher signal threshold), and validate the new profile with a few recalculations

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In the previous article "Developing a Replay System (Part 77): New Chart Trade (IV), I explained the subject as thoroughly as possible, while trying not to overcomplicate matters, even though this is often a rather complex topic. The question at hand is: how do you develop a communication protocol? This is essential if you want to transfer information between different applications or programs, whether they are running in the same environment or not. In our specific case, we want the Chart

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