Once you have a full file of 20 rounds in your score file you start to carry a low index. The low index is calculated from your lowest index of the last 12 months. You low index (L/I), however, cannot be calculated from a month that did not have a full file of 20 scores. When the 20th score is posted, all past indexes will change to that current month’s index so that you can establish a L/I. - Updated: August 10, 2005
