# MT4 & MT5 Decompiler, Recovery & Development EX4 to MQ4 and EX5 to MQ5 recovery assessment, program repairs, MT4 to MT5 conversion and custom development. Clear scope, published AISTIM cases and a free first enquiry. URL: https://mqlfix.top/ Language: en Updated: 2026-11-11 MT4 / MT5 · DECOMPILER & DEVELOPMENT Your trading software. A clear path forward. EX4 to MQ4. EX5 to MQ5. Source recovery, program repairs and custom development — with a file-specific assessment and clear deliverables. Get a free assessment ↗ See real work Private file handoff · Scope confirmed before payment MQLFix / FILE → ASSESSMENT → DELIVERY MT4 + MT5 COMPILED EX4 → MQ4 MT4 / MQL4 COMPILED EX5 → MQ5 MT5 / MQL5 AISTIM / PUBLISHED CASE Inspect the comparison ↗ FREE FIRST ASSESSMENT DEFINED DELIVERY SCOPE VERIFY BEFORE THE BALANCE ENGLISH / 中文 01 / SERVICES What do you need to get working? Start from the result you need. Recovery, repair and platform migration are quoted as distinct tasks. 01 / MT4 EX4 to MQ4 recovery MT4 indicators and Expert Advisors. Start with the original file and a clear delivery request. Explore service ↗ 02 / MT5 EX5 to MQ5 recovery MT5 source-recovery assessment with a defined scope, dependency list and verification process. Explore service ↗ 03 / REPAIR License & expiry issues Account binding, expiry messages and activation problems: define the issue and the permitted repair. Explore service ↗ 04 / MIGRATION MT4 to MT5 conversion Port MQL4 source to MQL5 and verify the behavior that matters to your workflow. Explore service ↗ 05 / BUILD Custom EAs & indicators Turn an explicit trading or display specification into software you can test and maintain. Explore service ↗ 06 / VERIFY Diagnostics & behavior checks Investigate errors, indicator differences and EA behavior using repeatable evidence. Explore service ↗ 02 / REAL WORK Evidence you can inspect. AISTIM / MT4 Apex Scanner Elite The published case compares chart displays, signals, price levels and input settings. Read what was checked, and the boundaries of the evidence. 75 input settings checked 9 dropdown options checked Read the case study → Published AISTIM case. BTCUSD M5 is one observed scenario; the screenshot does not cover every symbol, timeframe or input combination. Open image to inspect. 03 / HOW IT WORKS Know what happens next. 01 Describe & send Identify the platform and goal; share files privately. 02 Agree the scope Confirm feasibility, output, price and delivery window. 03 Review the build Compare against the original under agreed conditions. 04 Approve & receive Settle the agreed balance and receive the final files. SOURCE-RECOVERY REFERENCE A quote for your file. These ranges apply to a single indicator or EA recovery request, not every repair, migration or custom build. Confirm the total and delivery list before payment. One indicator $80–200 USD One Expert Advisor $200–500 USD 04 / FREE WORKBENCH Useful before you even contact us. ↗ Position-risk calculator Calculate volume from your own contract inputs. Open tool → % Drawdown recovery calculator See the return needed to recover a drawdown. Open tool → ↔ Points & price distance Convert points using the symbol point size you supply. Open tool → Local source-file check Check file types and migration signals without uploading code. Open tool → 05 / FROM THE KNOWLEDGE DESK A better brief. A better starting point. PRACTICAL GUIDE / 01 EX4, EX5, MQ4 and MQ5: what to send Identify your program, source files and dependencies before requesting a quote. Read guide → PRACTICAL GUIDE / 02 A practical MT4 to MT5 migration checklist Separate code changes from the behavior you need to preserve. Read guide → PRACTICAL GUIDE / 03 What to check before approving a verification build A repeatable acceptance process for source recovery and repair work. Read guide → YOUR NEXT STEP Have a file or an idea? Start here. Tell us your platform, your file and the result you need. We will confirm the scope before you commit. Request a free assessment → Contact: https://t.me/alonginchina Email: power.yang.china@gmail.com