This is interesting but, if I give you for example 12 months of data (Evenly distributed), how much time in the future will it be able to forecast?

We allow for you to specify the limit of the forecasting period, so you can experiment with that.

However, due to how we model the forecast, it isn't realistic to expect ultra-long term predictions, as eventually the forecast will revert to the mean of the series.

In a more practical note, we have seen good results with forecast windows in between 1/4 and 1/8 the size of the historic data given. So, in your case you could expect between 1-3 months of forecast.