Overview
The on balance indicator takes two inputs from the dataset. The first input is used to determine whether the second input is added or subtracted from the aggregate. Therefore, on balance requires two fields specified in order to be used. In the on balance volume case, the first input is the price, and the second input is the volume.
After selecting the two fields, you need to specify a size, which is the number of records in include in the calculation. That is, the on balance calculation is a rolling calculation where values added or subtracted from the total drop off after the given number of records.