This guide explores the entire verification ecosystem within AmiBroker—from built-in validation tools to advanced debugging techniques—giving you the confidence to deploy strategies without hidden errors.
Verification isn’t a one‑time step—it is an ongoing discipline that separates robust, professional systems from fragile, mistake‑prone scripts.
Mixing up single numbers (scalars) with data series (arrays).
// Visuals Plot( C, "Close", colorDefault, styleCandle ); PlotShapes( IIf(Buy, shapeUpArrow, shapeNone), colorGreen, 0, L, -15 ); Use code with caution. Copied to clipboard debug a specific error you're getting in your AFL editor, or should we look at optimizing a backtest amibroker afl code verified
Backtest shows massive profits on penny stocks due to zero transaction costs.
AmiBroker features a built-in syntax checker. Click the button in the AFL Editor to find basic syntax errors, missing semicolons, or undefined variables. Step 2: Test for Look-Ahead Bias Run a backtest over a specific date range. Note the exact trades and metrics. Change the end date of your backtest to an earlier date.
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Fix all missing semicolons, unmatched parentheses, and typos in variable names immediately.
: The script never references future data to make past trading decisions.
without signals appearing, disappearing, or shifting. // Visuals Plot( C, "Close", colorDefault, styleCandle );
SetBacktestMode( backtestRegularRawMulti ); // No redundant signals removed SetBacktestMode( backtestRegular ); // Removes redundant signals (default)
For complex logic, embed _TRACE() functions into your AFL code. The _TRACE function outputs internal variable states, loop counts, and string messages to the external DebugView application or AmiBroker's internal trace window. This allows you to monitor how your code thinks in real time. Blueprint of a Verified, Clean AFL Template