Systems and methods are disclosed for providing a financial account. The method includes measuring a coarse distance between the start point and an intermediate point using the lower resolution function, the intermediate point comprising a point which is substantially within one unit of the higher resolution function away from the true endpoint. An optional arrangement includes a biasing provision to restore the link to the original condition, for further use, after the load is reduced. The internal space has a variable volume. A portion of the predicted status is set equal to a portion of the new status, and a discrepancy between the predicted and visual statuses is determined.