Any stroke that only happens in your signature has special significance.
Your signature is very personal, so a stroke that happens only there applies to you on a very personal level.
If it is in your first name, it’s you, the individual.
If it is in your last name, it applies to your family (whether biological family or created family)
So take a good look at your signature compared to the rest of your writing to notice any unique strokes in the signature, then read up on your handwriting analysis to work out what these strokes mean.