# forge.testing.check_lookahead

```python
forge.testing.check_lookahead(strategy: str | os.PathLike[str] | type[Strategy], bars: SampleBars | pd.DataFrame | None = None, params: Mapping[str, Any] | None = None, *, symbol: str | None = None, timeframe: str | None = None, facts: Mapping[str, Any] | None = None, limit_prices: bool = False, min_trades: int | None = None, seed: int = 0) -> dict[str, Any]
```

Audit a strategy for look-ahead and return the report as plain JSON.

The strategy runs over ``bars`` (the kit's sample for its symbol when left out) and over
shortened copies of them under a fixed profile that removes position limits, sizing and prop
rules. ``limit_prices=True`` keeps the strategy's own order types. ``min_trades`` is the fewest
trades the audit needs to judge (10 when left out). The arguments are those of ``run``.

Since Forge API 1.