# forge.types.FillEvent

```python
forge.types.FillEvent(order_id: int | None, position_id: int, time: int, bar_index: int, price: float, size: float, side: OrderSide, is_entry: bool, reason: FillReason, costs: FillCosts, symbol: str, engine_reason: str, liquidity: str | None = None) -> None
```

One fill: an entry, or a whole or partial exit.

``time`` is int64 nanoseconds UTC. ``bar_index`` is the index in the strategy's primary series
of the bar whose interval holds that time. ``reason`` is the coarse reason a strategy reads and
``engine_reason`` the engine's own exit-reason name (``"entry"`` for an entry). ``liquidity`` is
``"maker"`` or ``"taker"`` once an exchange integration supplies it, and ``None`` until then:
forex and CFD brokers do not report it.

Since Forge API 1.