# Forecastion

> Forecast faster. Forecast better. Paste historical data, compare simple forecast methods, and copy outputs back into Excel or Google Sheets in one click.

Forecastion is a free web-based forecasting tool for finance teams, analysts, and operators. It runs entirely in the browser and supports two modes:

1. **Forecast Lab** — paste a time series, pick a forecast horizon, and instantly compare statistical methods (moving average, linear trend, exponential smoothing, Holt-Winters, logarithmic, S-curve, and more) with automatic backtestin.

2. **Monte Carlo Forecast** — build a notebook-like model with assumptions, formulas, and probability distributions. Run thousands of simulations to see output distributions, histograms, and summary statistics. Great for modeling with uncertainty.

## Pages

- [Forecast Lab](/): Paste historical data, compare methods, and export forecasts.
- [Monte Carlo Forecast](/model): Build probabilistic models with assumptions, formulas, and simulation.

## Optional

- Forecast methods include linear regression, logarithmic, moving average, exponential smoothing, growth rate (exponential growth), Holt-Winters (triple exponential smoothing), S-curve (logistic).
- Backtesting automatically splits historical data, trains on the first portion, to allow out-of-sample model fit testing.
- The Monte Carlo Forecast module allows users to combine forecasts, assumptions, and formulas to simulate thousands of possible futures.
- Exports include copy-to-clipboard for Excel / Google Sheets and CSV download.