There are two skin sweat lines (GSR), one of the skin sweat lines, called relative sweat, or sweat reduction, shows the reduction of sweat since the beginning of the session.

 

The first measurement of the session becomes the baseline at 0, then as you relax and reduce your skin sweat the line moves upwards.

 

The other measurement, called sweat stability, looks at how fast your skin sweat is changing.  This measurement is highly responsive and easier to change.  Your skin sweat only moves fast if you are excited, or you are immediately recovering from being excited.  The sweat stability measurement also rises as you relax, as your sweat changes become stable.  Stable sweat indicates relaxation, or more specifically lack of change due to excitement.