Try normalizing using fit

Some asymmetry modes involve normalizing the data. This can be done in one of two ways:

1. Take the average of the first or last x points
2. Use a fit parameter

If this switch is set to true, this calculation is done via the use of a fit parameter if it is available.

1f, 1n, and 1w

1. Take the average of the last 5 points
2. Use the baseline parameter to normalize

20 and 2h

1. Use the first point to normalize (affected by rebin)
2. Use the amp parameter to normalize