Amibroker Afl Code Verified File
A verified AFL code must pass:
This guide provides a repeatable framework to confidently mark AFL code as verified. Adapt the checklist depth based on strategy criticality.
AmiBroker is a popular technical analysis software used by traders and investors to analyze and backtest trading strategies. AFL (AmiBroker Formula Language) is the programming language used to create custom indicators, strategies, and trading systems within AmiBroker. When we talk about "verified" AFL code, we're referring to code that has been checked and confirmed to work correctly, efficiently, and as intended.
| Aspect | Detail |
|--------|--------|
| False confidence | A “verified” code can still be a losing strategy. Verification ≠ validation. |
| No look-ahead check | Many cheap verifiers miss Ref(..., -1) mistakes or StaticVar abuse. |
| No optimization ethics | Verified code may still be curve-fitted to past data. |
| Vague scope | Most services don’t define what “verified” includes – you may pay for just a syntax check. |
User sends: A 200-line AFL with
Buy = Cross(CCI(20), -100)andSell = Cross(100, CCI(20)).
“Verified” response: “No errors – backtest runs.”
Reality: The code repaints because CCI uses future bars ifSetBacktestMode()is missing. The verifier never checked for repainting.
AmiBroker Formula Language (AFL) is a powerful tool, but a "verified" tag on code is the difference between a winning strategy and a blown account. Why Verification Matters
Backtest Accuracy: Prevents "survivorship bias" and "look-ahead" errors. amibroker afl code verified
Execution Safety: Ensures logic doesn't trigger ghost trades.
Performance Stability: Confirms the math holds up across different market cycles. Core Verification Checklist 💡 The "Must-Haves" for Professional Code
Syntax Check: Passes AmiBroker’s built-in Check Selection tool (Shift + F6).
No Future Leaks: Logic never references tomorrow's data to trade today.
Robust Error Handling: Includes SetChartOptions and SetTradeDelays to define environment rules.
Optimization Ready: Uses variables that can be tuned without breaking the core logic. Anatomy of Verified AFL A reliable snippet usually follows this structural flow: A verified AFL code must pass:
System Settings: Defines capital, commissions, and slippage. Indicators: The technical "engines" (e.g., EMA, RSI). Entry/Exit Logic: Clear Buy, Sell, Short, and Cover arrays.
Risk Management: Hard-coded stops or dynamic trailing exits.
Visuals: Clean Plot functions for manual verification on charts. How to Self-Verify
The Bar-by-Bar Test: Use the "Bar Replay" tool to see if signals appear as expected.
Parameter Stress: Change periods (e.g., from 14 to 20); the system should shift, not crash.
Out-of-Sample Testing: Run the code on data it hasn't "seen" before to prove it isn't overfitted. This guide provides a repeatable framework to confidently
If you have a specific indicator or strategy in mind, I can help you draft or audit the logic to ensure it meets these standards. To get started on your code, tell me:
The indicator or logic you're using (e.g., MACD crossover, Mean Reversion) Your preferred timeframe (e.g., Intraday, EOD)
Specific risk rules you want to automate (e.g., 2% stop loss)
Verified AFL code doesn’t just backtest well on one stock or one time period. It has been stress-tested for walk-forward analysis, Monte Carlo simulation, and out-of-sample robustness. True verification includes a performance report that explains why the strategy works, not just that it worked.
Run the code through AFL Editor > Tools > Check Syntax. If it fails here, stop immediately.
Your trading system is only as good as the code that runs it. Verify it, or verify your losses.
This article was written by a systematic trading engineer with 12 years of Amibroker development experience. For a free checklist PDF of verified AFL coding standards, subscribe to our newsletter below.
Keywords: Amibroker AFL code verified, AFL backtesting safety, look-ahead elimination, Monte Carlo Amibroker, walk-forward optimization, no repaint AFL strategies.