To more accurately forecast a balance, why not just enter transactions with future dates and estimated amounts? Then a balance report with the same future date will be a good forecast.
This isn't a very nice comment (from my reading anyway).
> Be kind. Don't be snarky. Have curious conversation; don't cross-examine. Please don't fulminate. Please don't sneer, including at the rest of the community.
> Comments should get more thoughtful and substantive, not less, as a topic gets more divisive.
– Apple