# forge.ta.force

```python
forge.ta.force(source: ArrayLike, volume: ArrayLike, period: int = 13, method: str = 'sma') -> np.ndarray
```

Force index: the volume times the change of a moving average of the price.

``volume[i] * (MA[i] - MA[i-1])`` with the average ``method`` (``sma``, ``ema``, ``smma`` or
``lwma``), as MetaTrader 5 computes it. The first value is on bar ``period``.

Since Forge API 1.