Run this in the Analysis Window to verify columns mathematically.
// CORRECT – use DateTime Short = DateTime() == DateTimeValue("2025-12-10 14:30:00");
AmiBroker features a powerful, built-in Walk-Forward Analysis tool. WFA automates the IS/OOS testing cycle across shifting time windows. A system that passes WFA proves that its underlying AFL formula is robust and adaptable. 4. Common Errors That Ruin AFL Verification Error Type What Happens How to Fix It Code uses Ref(C, 1) or Zig() , creating fake 90%+ win rates. amibroker afl code verified
PlotText("Not enough data", Status("pxchartleft"), Status("pxcharttop"), colorRed); return; // Stop execution
and are ready for execution in charting, backtesting, or automated trading Run this in the Analysis Window to verify
// Verified AFL Code: Dual Moving Average Crossover Strategy // Target: Trend Following Systems _SECTION_BEGIN("System Settings"); SetChartOptions(0, chartShowDates | chartShowArrows); SetTradeDelays(1, 1, 1, 1); // Verified trade delays to avoid future leaks PositionSize = -10; // Allocate 10% equity per trade _SECTION_END(); _SECTION_BEGIN("Trading Logic"); FastMA = MA(Close, 10); SlowMA = MA(Close, 50); Buy = Cross(FastMA, SlowMA); Sell = Cross(SlowMA, FastMA); Short = Sell; Cover = Buy; _SECTION_END(); _SECTION_BEGIN("Visualizations"); Plot(Close, "Price", colorCandle, styleCandle); Plot(FastMA, "Fast MA (10)", colorBlue, styleLine | styleThick); Plot(SlowMA, "Slow MA (50)", colorRed, styleLine | styleThick); PlotShapes(IIf(Buy, shapeUpArrow, shapeNone), colorGreen, 0, Low, -15); PlotShapes(IIf(Sell, shapeDownArrow, shapeNone), colorRed, 0, High, -15); _SECTION_END(); Use code with caution. Best Practices for Maintaining Verified Code Document every logic change inside the code.
Absolute bar numbers vary with padding, QuickAFL, and aligned symbols, causing signals to disappear in backtests. A system that passes WFA proves that its
This is the holy grail. Verified code passes the "Future Leak Test" using StaticVarGet timestamps or the built-in equity() function to ensure signals are not using the close price of the current bar for entry.
