Trader's Journal

The backtest lookback window isn't a neutral parameter — it encodes a bet on regime persistence. Why the 2025 tariff shock broke every fixed-window EA.

Forex has no centralized order book — but queue imbalance, OFI and microprice proxies still hold predictive signal at 1–15 minutes on MT5. A feature-first guide.

Alpha Arena gave 6 frontier LLMs $10K each to trade live. Four lost up to 75%. Here's what the failure modes mean for anyone sold an 'AI-powered' MT5 EA.

cTrader 5.4's native Python ends the IPC-bridge era. A 2026 execution and architecture breakdown of C#/Python vs MQL5/Python-bridge for EA developers.

Stop guessing whether your live EA is broken. Use Monte Carlo confidence bands, rolling-Sharpe z-scores, and SPRT to separate decay from normal drawdown.

AQR tested 196 buy-the-dip variants over 60 years. The verdict reframes a core EA architecture choice: mean-reversion dip-buyer vs trend-following system.

EMA crossovers and Bollinger Band mean reversion aren't dead — but the data shows they clear the spread hurdle only on daily charts. A cost-adjusted framework for EA developers.

Jim Simons won barely half his trades and built one of history's greatest fortunes. Here's why expectancy times frequency — not win rate — is the only number that matters for EA design.

MT4/MT5 backtests fabricate intrabar fills from four OHLC points and a fixed spread. The engine — not your spread setting — is why live PnL underperforms.

AI-generated MT5 EAs silently inject look-ahead bias via bar[0] errors and LLM memorization. Detect it with the LAP test and feature-delay checks.

Master walk-forward optimization in MT5 Strategy Tester. Avoid curve-fitting, set IS/OOS ratios, interpret WFO efficiency, and build EAs that survive live markets.

Net profit is the last metric you should look at. Here's the complete four-tier analysis framework.

Some metrics predict future performance. Others just describe the past. Here's how to tell the difference.

Four tests that make it hard for a lucky strategy to pass — and easy for a genuine edge to prove itself.

Win rate, net profit, trade count — why each one can actively mislead you, and what to watch instead.

Spread, slippage, regime dependency, and martingale illusions — the hidden costs that flip a "winner" into a loser.

Moody's stripped the US of AAA on May 16, 2026 — and the dollar fell. How CHF, JPY, and gold rewired the safe-haven hierarchy for MT5 EAs.

AUD/USD at a 4-year high, DXY range-bound at 98.5, Section 301 hearings open. The FX transmission map for the May 14-15 Trump-Xi summit.

Geopolitical volatility has three phases. Each one requires a different trading approach.

The post-Cold War stability is over. Here's what has structurally changed — and how to adapt your strategy.

Five structural reasons geopolitical risk has moved from background noise to primary market driver.

Brent above $100, the Strait of Hormuz under threat, every central bank forced to reprice. What the oil shock means for USD, JPY, CAD, and your trading systems.

Six major central banks held rates in the same week — but their forward signals diverged sharply. Here's the rate divergence map and the cross rates it creates.

DXY above 100, zero Fed cuts priced, safe-haven flows on top. Two pillars are driving USD strength — and they have very different lifespans.

Tokyo, London, and New York create three distinct statistical regimes. Why MT5 EAs need session-aware logic and how to wire it up.

Use ADX as a regime classifier to switch your MT5 EA between trend-following and mean-reversion modules. Thresholds, dead zones, MQL5 code.

Master the Hurst exponent to detect trending vs. mean-reverting forex regimes. A deep-dive for MT4/MT5 EA developers and algorithmic traders.

Discover how high and low volatility regimes demand fundamentally different forex strategies — and how to build EAs that detect and adapt to both.

The Fed kept rates at 3.50–3.75%, raised its inflation forecast to 2.7%, and signaled just one cut for the year. With an Iran-driven oil shock reshaping the macro landscape, the dollar's trajectory is anything but simple.