# forge.indicator.Data

```python
forge.indicator.Data(*, timeframe: str | None = None, symbol: str | None = None, bars: str | Mapping[str, Any] | None = None, price: str | None = None, gaps: str = 'hold', day_boundary: str | None = None, **params: Any) -> None
```

Another series an indicator reads: a timeframe, a symbol, a bar type or a price.

``h4 = fg.Data(timeframe="H4")``, ``gbp = fg.Data(symbol="GBPUSD", timeframe="1D")``,
``boxes = fg.Data(bars="renko", brick=10)``. ``bars`` is a bar type name or a mapping with
``bar_type`` and ``params``; ``timeframe`` is C1's spelling or a free one (``7m``, ``4h``,
``1D``); ``price`` is ``bid``, ``ask``, ``mid``, ``last`` or ``quote``; ``symbol`` is a symbol
name or the name of a symbol setting (so is ``timeframe``, for a timeframe setting). The
declaration never touches data. A timeframe left out on time or Heikin-Ashi bars means the
chart's own.

A value of this series becomes visible on the first bar of the indicator whose close is at or
after that value's own close; there is no switch that shows it earlier. ``gaps="hold"`` repeats
the last closed value and ``gaps="nan"`` shows a value only on the bar where it arrived.
There is no look-ahead setting: ``fg.Data(lookahead=True)`` is refused.

Since Forge API 1.