Fathom forecasts are designed to be a financial model that stays relevant and close to your actuals. As Fathom brings in your actual financial data from the source system, the values your value rules and assumptions are based on will update as well.
Fathom’s forecast includes 12 months of actuals data in your main grid and forecasts for the next three years into the future. You're able to change the month that your actual financial results end and your Forecast data range begins. To do this, use the date range selector in the upper right hand corner of the Forecasting screens.
This is handy if you have Fathom set up to update the financial results from your source system automatically before any adjusting or closing entries have been made.