# QuantForum

> QuantForum is an independent community forum for algorithmic and AI-assisted trading: EA and bot building for MT4/MT5, backtesting and optimization methodology, AI/ML in trading, broker and platform reviews, and macro regime discussion.

QuantForum is an independent, public community forum. Content is user discussion,
not financial advice. Some early threads are disclosed editorial seed content;
see https://quantforum.dev/about for the full disclosure.

## Categories

- [EA & Bot Building (MT4/MT5)](https://quantforum.dev/c/ea-bot-building): Building Expert Advisors and trading bots: MQL4/MQL5, no-code builders, architecture, money management logic.
- [Backtesting & Optimization](https://quantforum.dev/c/backtesting-optimization): Testing methodology: data quality, walk-forward analysis, Monte Carlo, overfitting detection, forward testing.
- [AI & Machine Learning in Trading](https://quantforum.dev/c/ai-ml-trading): ML models, LLM-assisted workflows, AI analysts and signal services — what works and what is marketing.
- [Brokers & Platform Reviews](https://quantforum.dev/c/brokers-platforms): Measured, real-user experience with brokers, platforms and infrastructure: execution, slippage, VPS, data feeds.
- [Macro, News & Market Regime](https://quantforum.dev/c/macro-news): How macro events and regime shifts affect systematic strategies: news filters, volatility regimes, survival rates.
- [มุมภาษาไทย (Thai Corner)](https://quantforum.dev/c/thai-corner): เวทีพูดคุยภาษาไทยสำหรับนักเทรดสายอัลโก — Thai-language discussion for algo traders.

## Popular threads

- [Do backtests lie? My 99% modelling quality EA lost 40% live](https://quantforum.dev/t/10000000-0000-4000-8000-000000000005): Ran 5 years of backtests, 99% modelling quality, profit factor 2.1, realistic spread, slippage modelled. Live result: -40% in 11 weeks.…
- [Is anyone actually making money with ML-based signals?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000010): Honest question. Every ML trading story I find online is either a course ad or a hedge fund whitepaper I can't replicate. Is there anyone…
- [What percentage of retail EAs survive 90 days live?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000020): Serious question: does anyone have real data on retail EA survival rates? Anecdotally most EAs die within 3 months of live deployment. I've…
- [Tool that writes MQL5 from plain English — does it actually exist?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000001): I can read code but writing MQL5 from scratch is painfully slow for me. Is there any tool where you describe the strategy in plain English…
- [MT4 vs MT5 in 2026 — is it finally time to switch?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000014): Still running MT4 for most of my EAs because my brokers push it and my old code just works. But the MQL5 multi-currency tester and…
- [How do you handle EAs during high-impact news? Pause, reduce, or ignore?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000019): NFP, FOMC, CPI — do you pause the EA, reduce size, or let it run? I've seen all three preached with total confidence. What does the data…
- [Why do grid/martingale bots always die eventually?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000002): I've run grid bots on ranging pairs for years. The pattern is always the same: months of smooth 5-10% monthly returns, then one trending…
- [Overfitting checklist — 10 signs your strategy is curve-fit](https://quantforum.dev/t/10000000-0000-4000-8000-000000000008): After 8 years of building EAs, this is my personal checklist. Score 3 or more and the strategy is probably noise, in my experience: 1. More…
- [cTrader vs MetaTrader for algo trading — honest comparison](https://quantforum.dev/t/10000000-0000-4000-8000-000000000015): cTrader's C# API looks objectively nicer than MQL5. So why isn't everyone on it? Genuinely asking — what am I missing besides broker…
- [AI fund managers with published track records — worth copying?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000013): Came across PortfolioVerse (portfolioverse.wobr.ai) — around 470 AI "fund managers" with public simulated track records, each with a…
- [Walk-forward optimization: how many windows is enough?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000006): I'm building walk-forward optimization into my process. The literature says everything from 4 to 50 windows. Practically: how many…
- [I logged 30 days of slippage on 3 brokers — results inside](https://quantforum.dev/t/10000000-0000-4000-8000-000000000035): Following up on the "measured experience only" thread — here are my 30 days. Same EA (EURUSD M15, ~4 trades/day), same VPS region, three…
- [LLMs for market sentiment — practical setups?](https://quantforum.dev/t/10000000-0000-4000-8000-000000000011): Is anyone piping news or headlines through an LLM for sentiment scoring as an EA input? Curious about the practical side: latency, monthly…
- [Structuring a multi-symbol EA without it becoming spaghetti](https://quantforum.dev/t/10000000-0000-4000-8000-000000000003): I'm refactoring an EA that trades 6 symbols and the OnTick handler is becoming an if-else forest. Every symbol has slightly different state…
- [Which brokers are actually friendly to EAs? Measured experience only](https://quantforum.dev/t/10000000-0000-4000-8000-000000000016): Beyond marketing claims: which brokers have you *measured* as genuinely good for EAs — tight real spreads during news, minimal slippage, no…

## Site pages

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