Rule-compliant risk engines
Daily-loss and max-drawdown guards that mirror your specific firm's calculation, with flatten-on-breach, cooldowns, and configurable buffer below the actual limit.
Trading Software Development
Prop Firm EA Development — Software Built Around the Rules
Prop firm challenges are passed by risk management first and edge second. The firms' rules — max daily loss, max total drawdown, minimum trading days, news restrictions, consistency clauses — are a hard constraint set that most retail EAs were never designed for. We build EAs where the rules are the architecture.
NDA by default You own the source code Fixed scope, fixed quote
Overview
What this service actually involves
Concretely: equity floors computed on the firm's exact basis (balance vs equity, intraday trailing), daily-loss circuit breakers that flatten before the breach, session and news-window guards, and sizing that adapts to remaining drawdown headroom instead of ignoring it.
One thing we won't say: 'guaranteed to pass.' Anyone claiming that is selling a fantasy. We build rule-compliant, honestly backtested software — the edge still has to come from a viable strategy, and we'll tell you during scoping if yours doesn't look viable against the rules you're targeting.
Scope
What we build
Concrete deliverables, not a capability list. Every item below is scoped in writing before a fixed quote is issued.
Drawdown-aware position sizing
Lot sizing that reads remaining headroom rather than a fixed percent — sizing shrinks as the equity trough approaches and recovers with it.
News & session compliance
Economic-calendar filters with firm-specific blackout windows, position handling through news (flatten, tighten, or hedge per your rules), and trading-day requirements tracked.
Multi-firm configurations
One strategy, many rule packs: challenge vs funded vs different firms handled through config, not code forks.
Pass-mode vs trade-mode
Deliberately different behavior for challenge (hit target within constraints) vs funded (preserve capital, compound cautiously) — switching profiles, not rewriting the EA.
Example scopes
Recent example scopes
Anonymized project briefs in the shape real requests arrive — platform, fixed quote, and timeline agreed before work starts.
FTMO challenge EA with trailing-drawdown guard
MT5 · fixed quote · 3 weeks
Trend-pullback strategy with a drawdown engine tracking FTMO's equity-trough-based limit at 0.5% buffer, daily-loss flatten at -0.8% actual, and minimum-day logic. Delivered with 5-year real-tick tests showing worst-year headroom against both constraints.
Funded-account preservation overlay
MT5 · fixed quote · 1 week
An overlay EA that sits between the client's existing system and the broker: monitors firm rules, caps exposure per symbol, enforces news flatten, and can assume control of any position if the base EA exceeds defined behavior bounds.
Copy-trading risk bridge for prop accounts
MT5 · fixed quote · 2 weeks
Copier that maps a leader's signals into prop-safe sizing: converts fixed-lot leader trades into headroom-based lots on the follower, with daily-loss flatten that never touches the leader's other followers.
See it work
The sizing box, running live
The arithmetic the panel runs before it sends an order: risk budget, risk per lot, lots rounded down to the broker step, and a refusal when the budget will not cover the minimum.
Risk-based position sizing
The panel's own sizing maths, live
Order sizeable
Risk budget (1.0% of balance)$100.00
Risk per 1.00 lot (45 pips)$450.00
Position size0.22 lots
Actual risk at that size$99.00
Rounding down to the lot step leaves $1.00 of the budget unused — under the cap by design, never over.
One pip = 0.10 on XAUUSD, worth $10.00 per 1.00 lot. Lots round down to the 0.01 step so the risk cap is never breached by rounding — the same rule the delivered panel applies before it sends an order.
Pricing guidance
Typical project ranges
How budgets map to scope on this service. Your exact fixed quote arrives in writing after a scoping conversation — the numbers below are directional ranges, not promises.
| Scope | Typical range (USD) | Delivery |
|---|---|---|
| Rule-compliance overlay for existing EA | $600 – $1,200 | 1–2 weeks |
| Full prop-compliant EA build | $1,200 – $2,500 | 2–4 weeks |
| Multi-firm config system + validation | $2,000 – $3,500 | 3–5 weeks |
Prop-firm EA work runs $600–$3,000: overlays and rule-guards for existing systems at the low end, full strategy builds with multi-firm configs and validation at the top. Fixed quote after we review your firm's rules and your strategy's viability.
FAQ
Questions traders ask before hiring
Related
Where this goes next
Strategy Optimization & Backtesting
Prove the rule-headroom claims on real tick data.
Expert Advisor DevelopmentThe general EA build service this specialization sits on.
Trading Bot Development24/7 operation, VPS, and monitoring for funded accounts.
How we workFixed quotes, NDA, source-code ownership.
Delivered by prop firm EA developers. Read about how we work: fixed quotes, milestone demos, source-code ownership, and a 30-day bug-fix window.
Ready to build this?
Book a 30-minute call and bring the strategy, the broken tool, or the rough idea. You leave with a written fixed quote — price, scope, delivery date — before any work starts.
Book a Free Call
A 30-minute call, no obligation. You leave with a written fixed quote — scope, price, delivery date.