ManifoldBT Docs

Explain an error returned by the manifoldbt engine: what it means, what caused it, and how to fix it. Paste the message verbatim. Use this before changing code in response to an engine error -- these messages name a rule rather than the mistake, and guessing wastes a round trip.

Which manifoldbt version this documentation covers, and which of the THREE licence tiers each feature needs. Check before writing code around sweeps, walk-forward, cross-exchange, the GPU or the tick layer: the first three refuse on Community, the last two on anything below Researcher -- and the two Researcher gates raise different exception types.

START HERE. Returns a complete, runnable backtest script (open a store, strategy, config, fees, run, read the metrics) plus the stateful-band, bracket-exit, higher-timeframe and cross-asset variants -- then the list of rules the engine enforces and of what a fill actually does (which fee a stop pays, where a gapped bracket fills, what a reversal counts as). One call replaces the eight searches every first script otherwise needs.

Search the manifoldbt documentation: DSL rules and pitfalls, indicator and API signatures, config fields, execution semantics (which price a stop or target fills at, which fee each fill pays, what a reversal counts as, which ddof an indicator uses), how to read result metrics honestly, and worked examples. Ask in natural language ('how do I reference another symbol', 'what happens when a bar gaps through my stop', 'is this Sharpe meaningful') or by name ('symbol_ref', 'warmup_bars'). Pass a result's exact title to read that chunk again. A chunk already sent in this session is not sent again.