Estimated total
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$0–$0
How Much Does It Cost to
Build a Custom Trading EA?
Developer rates, hidden time costs, backtesting infrastructure, and the build vs buy calculation most traders get wrong.
Published 15 June 2026 · Updated as market rates change
Building a custom MT5 EA from scratch costs $6,000–$11,000+ when you include strategy development, developer fees, backtesting, and forward testing time. For most retail traders with accounts under $25,000, buying a proven EA ($100–$800 one-time) is significantly more cost-effective. The break-even point where building makes financial sense is typically a $50,000+ account with a genuinely original, proprietary strategy.
What Actually Goes Into Building a Custom EA?
Most traders who enquire about building a custom EA have the wrong mental model. They imagine a developer sitting down, writing code, and handing over a working EA. In reality, EA development is a five-phase process — and only one of those phases is actual coding.
1. Strategy Design
20–80 hours$1,500–$4,000Before a single line of code is written, you need a complete, testable strategy specification. Every rule must be expressed in exact, unambiguous terms: entry conditions, exit conditions, stop loss calculation, take profit targets, filters, session windows. Vague ideas ("buy when price looks strong") cannot be coded.
2. EA Coding (MQL5)
40–200 hours$1,200–$5,000The actual development work. A simple EA with one entry signal and fixed SL/TP takes 40–60 hours. A complex EA with multi-timeframe analysis, dynamic trailing stops, spread filters, session management, news filters, and recovery logic takes 150–200 hours. Developer location determines the dollar cost.
3. Backtesting & Optimisation
2–4 weeks$300–$1,000Testing the EA on historical data to evaluate performance. Quality tick data for XAUUSD costs $50–$200/year. Optimisation (finding parameter combinations) can take days of computer time. If backtests show poor results, the strategy may need to be redesigned — restarting the cycle.
4. Forward Testing
3–6 monthsOpportunity costRunning the EA on a demo account in real-time to validate that backtest results hold in live market conditions. This phase is non-negotiable — backtests can be curve-fitted to look perfect. Forward testing reveals real performance. 3 months minimum; 6 months gives statistical confidence.
5. Ongoing Maintenance
Quarterly$200–$500/yearMarkets evolve. Broker conditions change. MT5 is updated. An EA that worked in 2024 may need parameter adjustments in 2026. Budget for annual maintenance, especially after major market regime changes.
Developer Rates by Location and Type
The same EA specification can cost dramatically different amounts depending on who builds it. The MQL5 Freelance marketplace is the most common place to hire — it connects you with developers globally.
Note: Lower-cost freelancers can deliver excellent results — the MQL5 platform has rigorous reviewer ratings. Check completed project reviews carefully. A developer with 50+ completed EA projects and 4.8+ star rating on MQL5 Freelance is typically reliable regardless of location.
What Would It Cost to Build YOUR EA?
Adjust the parameters to estimate the cost for your specific situation.
Strategy Complexity
Developer Location
Include Professional Backtesting?
Estimated Development Cost
$2,500 – $6,500
+ 3–6 months forward testing before you can trust it
When Does Building Make Financial Sense?
Building is not always the wrong choice — but the math needs to work. Here are the conditions where a custom build makes genuine financial sense versus where buying a proven EA is the smarter move.
Build makes sense when...
- ✓Your strategy is genuinely proprietary and not available anywhere
- ✓Account size is $50,000+ (ROI on development cost is reasonable)
- ✓You have a documented, rule-based strategy that can be precisely specified
- ✓You're building for a fund or institutional use case
- ✓You have 6–12 months to invest in development and testing
Buy makes more sense when...
- ✗Account is under $25,000 — development cost exceeds ROI
- ✗You don't have a precise, rule-based strategy already documented
- ✗You want to start trading within weeks, not months
- ✗You need ongoing support and updates included
- ✗You want a strategy already forward-tested with live results
The Hidden Costs Most Traders Miss
The developer invoice is just the visible portion of the cost. Here are the costs that are consistently underestimated.
Strategy specification time
20–80 hours of your timeWriting a strategy specification tight enough for a developer to code takes far longer than most traders expect. "Buy when the 20 EMA crosses above the 50 EMA" is not enough. You need exact rules for every scenario: what happens on a tie, on a weekend gap, on a spread spike, on news.
Revision cycles
1–3 rounds typicalAfter receiving the first version, you will almost certainly find edge cases the specification did not cover. Each revision round adds 10–30% to the project cost and timeline. Complex strategies often go through 3+ revision rounds.
Quality tick data for XAUUSD
$50–$300/yearBacktesting on MT5's default "every tick based on real ticks" mode requires downloading historical tick data. Free data is incomplete. Quality tick data from providers like Dukascopy or Tickstory costs $50–$200+ per year.
The opportunity cost of forward testing
3–6 monthsYou cannot trade a new EA in real money until it has been forward tested. This is 3–6 months of watching your strategy run on demo while your capital sits idle. For a $10,000 account expecting 10% monthly returns, that is a $3,000–$6,000 opportunity cost.
Abandoned projects
Full development costIndustry data suggests 40–60% of custom EA projects are abandoned before completion — either because the strategy does not backtest well, the developer relationship breaks down, or the specification proved impossible to code. Budget for this risk.
Further Reading
Relevant pages to help you make the build vs buy decision.
Frequently Asked Questions
For an MT5 EA targeting XAUUSD, expect $1,500–$5,000 for the coding alone if you already have a fully documented strategy. If you need the developer to also design the strategy, add $3,000–$8,000 more. Freelancers in Eastern Europe or Asia typically charge $30–$60/hour. Western freelancers and agencies charge $80–$200/hour.
MQL5 is a free language and the MetaEditor IDE is included with MT5 at no cost. If you invest the time to learn it (typically 100–300 hours for a working EA), your only cost is time. However, most traders significantly underestimate the time needed to build, debug, backtest, optimise, and forward-test a profitable EA.
A simple EA (one indicator signal, fixed SL/TP) takes 2–4 weeks with an experienced developer. A complex EA (multi-timeframe analysis, trailing stop ladder, session filters, spread filter, news filter, recovery logic) takes 2–4 months. Forward testing alone adds 3–6 months before you can trust results.
The most overlooked costs are: (1) Strategy development time before you even hire a coder — defining rules precisely enough for a developer to code takes 20–80 hours. (2) Backtesting infrastructure — quality tick data for XAUUSD is not free. (3) Forward testing period — opportunity cost of 3–6 months not trading while waiting for results. (4) Ongoing maintenance — markets change, and EAs need parameter updates.
Building makes sense if you have a genuinely original, well-tested strategy that does not exist in the market, an account large enough to justify the development cost (typically $50,000+), and the patience to spend 6–12 months on development and testing. For most retail traders with accounts under $25,000, buying a proven EA is significantly more cost-effective.
Goldie Razor V2.8.4
M15 breakout + H4 EMA filter — built for XAUUSD on MT5