Amibroker Afl Code Verified [upd] -
When plotting shapes (Buy/Sell arrows), Amibroker often minimizes redundant signals (e.g., if you are in a trade for 10 bars, it shows one arrow at the start). To verify that your logic is triggering every single bar the condition is true (useful for debugging volatility or stop-losses), use _NOROBOTS .
When using community code, always apply your own verification process—do not assume that a script is verified simply because it is published.
// Signal Logic rsiVal = RSI( period ); Buy = Cross( rsiVal, buyLevel ); Sell = Cross( 70, rsiVal );
: After any change, use “Send to Analysis Window” (the icon with the blue arrow) to ensure the Analysis window loads the latest code. The Analysis window does auto‑save the editor’s content when you press Backtest/Scan only if you are using the built‑in AFL editor (not an external editor). However, “Send to Analysis Window” eliminates all doubt.
// --- 6. Plotting (optional) --- Plot( C, "Price", colorBlack, styleCandle ); Plot( RSIval, "RSI", colorGreen ); PlotShapes( Buy * shapeUpArrow, colorGreen, 0, Low ); amibroker afl code verified
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Plot key intermediate variables:
: A separate utility (usually from Microsoft) that allows you to use the
Before writing verified code, you must understand the coding errors that compromise system validity. 1. The Dreaded Look-Ahead Bias // Signal Logic rsiVal = RSI( period );
Messages are routed to the internal Log Window (Window → Log) the AFL preference “send _TRACE output to internal log” is enabled (Tools → Preferences → AFL). Without that check, output goes to an external debug viewer like DebugView++.
Once your code compiles without syntax errors, run these three audits to fully verify its performance: The Empty Data Test
AFL can be executed in two modes, and confusion between them is the #1 source of unverified behavior.
Look beyond total net profit. Verify your strategy using the Sharpe Ratio , Maximum Drawdown , and Profit Factor . A strategy with a massive profit but an unsustainable 60% drawdown is unverified for live trading. // --- 6
Before relying on a strategy for live trading, it is wise to profile your code for efficiency. AmiBroker includes an (available under Tools -> Code Check & Profile in the AFL Editor) that provides a detailed per‑function timing report. This helps identify bottlenecks—such as unnecessary loops, repeated calculations, or heavy array operations—that could degrade performance when processing thousands of symbols or in a real‑time environment.
// CORRECT result = IIf(Variable == 10 , High, Low);
Execute a wide-market database scan across thousands of symbols using the built-in Analysis window. Confirm that the algorithm successfully maps parameters without throwing runtime array errors. Walk-Forward Testing