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R49 · Reproduce, repair, retest

Three-Case MQL4 or MQL5 Micro Repair

One reproducible defect in buyer-owned or authorized MQL4/MQL5 source up to 500 lines, repaired and retested against three agreed cases.

What is included

  • Compile, runtime and affected-flow diagnosis
  • One agreed defect in source up to 500 lines
  • Experts and Journal log review when supplied
  • Corrected editable source and compiled build
  • Three-case evidence, change note and setup notes
  • One scope-conformance revision

What I need from you

  • Editable MQ4/MQ5 source and required includes
  • Current behaviour and expected behaviour
  • Exact reproduction steps, symbol and timeframe
  • Relevant logs, screenshots and terminal build
  • One expected case, one must-not-happen case and one restart or failure-path case

Scope boundaries

  • No EX4/EX5 decompilation or protected-code extraction
  • The three written cases pass or delivery is not finished
  • A revision covers the agreed issue, not unrelated features
  • Performance changes are measured, never promised

What three acceptance cases look like

My owned duplicate-bar gate probe used three synthetic input cases in the actual HolaPrime MT5 terminal: two passed before the fix and all three passed after it. This isolated check did not place orders or test a customer bot. Your repair uses three cases agreed for your defect.

BAR-01 · first tick

A valid EURUSD M1 bar arrives for the first time.

Expected: Accept the bar once. This check passed before and after the fix.

BAR-02 · duplicate tick

A second tick arrives with the same bar timestamp.

Expected: Refuse another bar action. This check failed before and passed after the fix.

BAR-03 · missing time

The bar timestamp is missing.

Expected: Refuse the bar action. This check passed before and after the fix.

Source-backed proof

Inspect the R49 duplicate-entry repair

The owned three-case gate probe ran in the actual HolaPrime MT5 terminal: 2/3 before, 3/3 after the duplicate-bar fix. Its test conditions are synthetic. No order execution, full strategy run or client result is shown.

Read the original before/after log See the full source and captures

Free scope resource

MT5 EA Journal Error Checklist

Start with the exact error line, symbol and request values, then follow the first technical checks in the Journal Doctor guide.

Open the error checklist

Free preparation guide

MQL5 Expert Advisor Bug Report Checklist

Open checklist

Trading risk disclosure

Futures and forex trading contains substantial risk and is not for every investor. An investor could potentially lose all or more than the initial investment. Risk capital is money that can be lost without jeopardizing one's financial security or lifestyle. Only risk capital should be used for trading, and only those with sufficient risk capital should consider trading. Past performance is not necessarily indicative of future results.

Hypothetical performance disclosure

Hypothetical performance results have many inherent limitations. No representation is being made that any account will or is likely to achieve profits or losses similar to those shown. There are frequently sharp differences between hypothetical performance results and the actual results subsequently achieved by any particular trading program. Hypothetical results are generally prepared with the benefit of hindsight, do not involve financial risk, and cannot completely account for the impact of financial risk in actual trading. Market conditions, the ability to withstand losses, and adherence to a trading program can all materially affect actual results.

NinjaTrader trademark disclosure

NinjaTrader® is a registered trademark of NinjaTrader Group, LLC. No NinjaTrader company has any affiliation with the owner, developer, or provider of the products or services described herein, or any interest, ownership or otherwise, in any such product or service, or endorses, recommends or approves any such product or service.

Testimonials, when shown, may not represent the experience of other clients and are not a guarantee of future performance or success. Virtual-currency trading carries additional risks. See the CFTC customer advisories. Read the full financial risk disclaimer.