Trends manipulation / forecast

[epps]

Hello there,

is it possible to manipulate a Trend?
I use the Weather script from the Examples. In there is a Object call: "precipitation_amount_6h". If i run the Script every hour then i have a continius forecast of 6hours of Rain.
Can i manipulate a Trend to show the aktual data +6hours. So i hava a "forecast trend" ?

I hope you understand what i mean.

Thanks.
Kind regards.
Epps