The MQL5 code base hosts thousands of free expert advisors. Forums overflow with free systems, cracked commercial EAs, and set files. If free options exist, why would anyone pay four figures? It is a fair question with an uncomfortable answer: in trading software, free is frequently the most expensive option available.
Where free EAs actually come from
- Learning projects. Most free code base EAs are programming exercises: a moving average cross, an RSI threshold. Educational, untested at scale, never traded live by their authors.
- Marketing funnels. Free versions with limitations designed to upsell, or free EAs that require signing up at a specific broker through the developer's affiliate link. The product is free because you are the product.
- Abandoned experiments. Someone's weekend idea from 2019, uploaded and forgotten. No updates, no support, unknown behavior on current market conditions.
- Cracked commercial software. Pirated EAs from forums, frequently modified, occasionally carrying actual malware, always without support or updates.
The three real costs
Cost one: your capital during the testing phase. A free EA arrives with no verified track record, so your live account becomes the test environment. Six months of live testing an edge-less system at modest risk quietly costs more than most commercial EAs.
Cost two: your time. Screening dozens of free systems, backtesting them properly, discovering the curve-fit ones (most), and monitoring behavior takes serious hours. Time spent auditing free code is time not spent on anything productive.
Cost three: the incentive vacuum. A developer with no revenue has no obligation. No updates when broker specifications change, no support when initialization fails, no accountability for results. You inherit a codebase with no owner.
When free genuinely makes sense
Free EAs are excellent for learning MQL5, for testing infrastructure (does my VPS work, does my broker handle EAs), and for programmers who intend to audit and modify the code themselves. What free EAs are not is a substitute for a verified trading system, because the verification is the product. The backtest across thousands of trades, the live MyFXBook account, the documentation, the support channel: that is what the money buys. The code is almost the cheapest part.
The audit checklist, if you insist on free
Free EAs have legitimate uses, so if you proceed, proceed like an engineer rather than a hopeful. Source code or nothing: only run free EAs whose .mq5 source is provided; a free compiled .ex5 from a forum is an unauditable binary with account access, which is malware distribution's favorite costume. Read for the deal-breakers: any position sizing that references previous losses (martingale in disguise), any DLL imports or WebRequest calls to unknown URLs (data exfiltration risk), any hardcoded magic numbers that could collide with other EAs on the account. Backtest it yourself on your broker's data with realistic spread settings; never trust an attached screenshot. Then demo it for a minimum of a month, comparing its live behavior against the backtest trade by trade. Budget honestly for this: the audit process above is several evenings of work per candidate, and most candidates fail it. That labor cost, priced at any reasonable hourly rate, is the invisible line item that makes free expensive.
The middle path most traders actually need
The real decision is rarely free versus $4,995; it is a portfolio of uses. Free and cheap EAs are genuinely the right tool for infrastructure validation (does the VPS stay connected, does the broker execute EA orders cleanly, do you understand attachment and settings), for learning MQL5 by reading working code, and for scratching the tinkering itch somewhere it cannot hurt the main account. Verified commercial systems are the right tool for the capital that matters, where the product being purchased is not code but evidence: thousands of documented trades, a live third-party track record, support with accountability, and a vendor whose income depends on the thing continuing to work. Run both in their lanes: a sandbox account for the free experiments, the main account for the verified system, and never let the two share a login. The traders who get burned are rarely the ones using free EAs. They are the ones using free EAs for the job that evidence was supposed to do.