For those ready to embark on this path, the official AmiBroker User's Guide is an essential reference. Start small, verify each component, and always question the results. That is how good systems are built, and it's how great traders are made.
and are ready for execution in charting, backtesting, or automated trading
SetTradeDelays(1, 1, 1, 1); // Verified: Buy on next bar's open SetOption("InitialEquity", 100000); SetOption("FuturesMode", False); SetPositionSize(100, spsPercentOfEquity);
Trade with verified data. Trust only the confirmed close. And never let a look-ahead bias rob you of your capital. amibroker afl code verified
Finding verified AFL code requires looking at reputable sources within the AmiBroker community.
Run a full Bar Replay on your data to simulate live execution. Compare trade timing and outcomes with the original backtest.
The first step toward verification occurs entirely within the AmiBroker software interface . This step confirms that the code is free of typos, logical formatting errors, and broken array references. For those ready to embark on this path,
The most common mistake in AFL programming is accidentally coding a system that "predicts" the future. This happens when code references future data bars to make a decision in the present.
Open the AFL Editor by going to in AmiBroker. Use the Check button (the green checkmark icon) frequently. This tool scans your code for syntax errors and displays them instantly in the bottom output window. Step 2: Enforce Strict Array Checking
// Strategy Parameters period = Param("RSI Period", 14, 2, 50, 1 ); buyLevel = Param("Buy Threshold", 30, 1, 50, 1 ); and are ready for execution in charting, backtesting,
// Example of clean, structured, verification-ready AFL SetFormulaName("Verified Dual EMA Crossover"); // 1. System Parameters fastPeriod = Param("Fast EMA", 10, 2, 50, 1); slowPeriod = Param("Slow EMA", 21, 2, 100, 1); // 2. Core Logic fastEMA = EMA( Close, fastPeriod ); slowEMA = EMA( Close, slowPeriod ); // 3. Buy/Sell Rules Buy = Cross( fastEMA, slowEMA ); Sell = Cross( slowEMA, fastEMA ); // 4. Verification Check: Eliminate logical redundancy Buy = ExRem( Buy, Sell ); Sell = ExRem( Sell, Buy ); // 5. Plotting Plot( Close, "Price", colorCandle, styleCandle ); Plot( fastEMA, "Fast EMA", colorBlue, styleLine ); Plot( slowEMA, "Slow EMA", colorRed, styleLine ); Use code with caution. Eliminating Look-Ahead Bias
// Standard plotting PlotShapes(IIf(Buy, shapeUpArrow, shapeNone), colorGreen, 0, Low, -15);