Graph notations explanation (459 Views)

Hi. Am new to Thoro-Graph and still learning.
A few newbie questions:
1) Under the How to Use section for the Graph, it states Turf races are preceded by a dash (-), but I always see a double dash (--) for these races. Is it the same thing?
2) I also sometimes see a double dash (--) AFTER the the TG number. It does not appear to reference Turf races. What is the meaning AFTER the TG number?
3) What does "neg #" mean after the TG number? I noticed this after several random TG numbers, not just a "0". I'm confused about this notation (neg #).

Thanks for your help.