Best fit retrieval - initial and final values

A point will be returned at the query start time and the query end time for each tag queried, if a point exists for that tag at or after the end time of the query. The values of the initial and final points will be determined by interpolating the points preceding and following the query start or query end time.

Standard interpolation rules will be used to return the initial and final values. For more information, see Interpolated retrieval.