The Update Asset method allows you to update the current balance of an Asset as well as the freshness timestamp for this balance however specifying a timestamp in the past does not update that Asset's historical balance but rather it's current balance (from the perspective of the net worth view). This limitation makes writing integrations for different account sources (as well as backfill for account values older than the data imported by plaid) significantly less useful.

If this method also allowed updating the balance for a range of dates (for backfill) this would be even more useful.

Somewhat related to: