> For the complete documentation index, see [llms.txt](https://indicators.agenatrader.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://indicators.agenatrader.com/standard-indicators/forecast-oscillator-fosc.md).

# Forecast Oscillator (FOSC)

#### Description <a href="#description_36" id="description_36"></a>

The FOSC makes a comparison of the current price against the value returned by the Time Series Forecast study. It is calculated as a percentage ratio of the difference between the close price and the Time Series Forecast value for the previous bar.

When this oscillator displays positive values, it hints that the Time Series Forecast has underestimated the price, whereas negative values suggest that the TSF has overestimated the price. Usually, an SMA also accompanies the Forecast Oscillator line in the search for oscillator reversals.

#### Further information <a href="#further-information_17" id="further-information_17"></a>

FMLabs: <http://www.fmlabs.com/reference/default.htm?url=ForecastOscillator.htm>

#### Parameters <a href="#parameters_34" id="parameters_34"></a>

inSeries Input data series for the indicator

period Number of bars included in the calculations

#### Return value <a href="#return-value_37" id="return-value_37"></a>

**double**

When using this method with an index (e.g. **FOSC**(14)\[**int** barsAgo] ), the value of the indicator will be issued for the referenced bar.

#### Usage <a href="#usage_37" id="usage_37"></a>

```csharp
FOSC(int period)
FOSC(IDataSeries inSeries, int period)
FOSC(int period)[int barsAgo]
FOSC(IDataSeries inSeries, int period)[int barsAgo]
```

#### Visualization <a href="#visualization_38" id="visualization_38"></a>

![Forecast Oscillator (FOSC)](https://agenatrader.github.io/AgenaIndicator-documentation/media/FOSC.jpg)

#### Examples <a href="#examples" id="examples"></a>

```csharp
//Output for the Forecast Oscillator
Print("The current value for the Forecast Oscillator is: " + FOSC(14)[0]);

//Determining the future market direction
if (FOSC(14)[0] > 0)
Print("The FOSC is bigger than zero, which indicates rising price movements.");
```


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