Use the Number of Forecasts combo box at the top of the Forecast tab to specify the number of Forecasts that a Forecast database item is to hold.
Each Forecast is a series of values that typically occur at the interval specified in the Value Interval field, below.
You can configure each Forecast database item to hold between 1 and 8 separate Forecasts. Once the specified limit is reached, ClearSCADA automatically deletes the oldest Forecast whenever a new Forecast is imported.