I will fix, debug, and validate tradingview pinescript repainting, lookahead bias
Software Architect and Quant Developer
Vetted by Fiverr Pro
Robert Brendler was selected by the Fiverr Pro team for their expertise.
Vetted for
Trading Bots Development
About this Gig
Vetted Pro
A Pine Script strategy can compile perfectly and still produce misleading backtests, inconsistent alerts, repainting behavior, or incorrect execution logic.
Finding those problems requires more than fixing syntax; it requires understanding how the entire system behaves. I provide independent technical reviews of TradingView PineScript projects, from small indicators to large commercial trading systems.
My audits can include:
- Repainting / non-repainting verification (the #1 silent killer)
- Lookahead and future-data leaks in request.security()
- Multi-timeframe validation
- Entry & exit logic verification (Pine v6 ready)
- Alert behavior review
- Backtest realism assessment (fees & slipping)
- Code quality & maintainability review
- Performance and optimization suggestions
Every audit includes a clear explanation of the issues found, why they matter, and practical recommendations for improvement.
Whether your script was written by yourself, another developer, or generated by AI, I'll identify hidden problems, validate the trading logic, and help ensure the implementation behaves as intended.
For large or commercial projects, please contact me before ordering so we can discuss the scope.
Platform:
TradingView
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MT5
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Other
My Portfolio
FAQ
Can you fix AI-generated Pine Script from ChatGPT, Caude, PineGen, Quant, etc?
Yes — one of my most common requests. AI code often compiles but behaves incorrectly: silent logic errors, repainting, false confidence. I debug it, correct the logic, and harden it for live use.
Will you fix the issues you find?
If the fixes are within the selected package scope, yes. For larger architectural problems, I'll explain the recommended solution before making major changes.
Can you review commercial indicators?
Yes. Confidentiality is respected, and I can review proprietary code under NDA if required.
What kinds of issues do you typically find?
Examples include: Repainting, Lookahead bias, Incorrect MTF implementation, Alert timing problems, Logic contradictions, Inefficient code, Unrealistic backtest assumptions, Risk management flaws
Do you guarantee profitability?
No. My role is to validate the correctness and reliability of the implementation—not to predict market performance.
My script works but feels "off".
That's exactly the kind of project this gig is designed for. Many issues are subtle and only become apparent through a structured review.
Is my indicator repainting — how do you check?
I verify whether historical signals change on reload, whether your request.security() and lookahead settings leak future data, and if entry signals are triggered at the correct point in time. You get a clear yes/no with proof on the chart, plus a non-repainting fix wherever the logic allows.
Do you handle Pine Script v6 migration?
Yes. I upgrade v4 and v5 scripts to v6, fixing deprecated-function errors and the integer-division and boolean-logic changes that silently break older code.
What if my strategy is just bad — will you tell me?
Honestly, yes. You get a straight verdict on whether the edge is real or too good to be true. I'd rather lose the upsell than deliver crap you'd waste your money on. I prefer long-term collaboration. After the first strategy works, I'll help you with strategy diversification. See my progression plan

