Short answer: weathervane tattoos symbolize the direction of your life in which you are heading. in other words, it is an indicator of the path in which your life will take.
This type of tattoo has a long history and can be found in many people all around the world.

It was believed that when the Native Americans got injured they would look for an animal to live life as. They would then take this animal and tattoo it on their body which would allow them to gather its traits and take those with them throughout their lives.
This symbol only works well if you have a strong personality that you follow no matter what. If you do not have that kind of personality then this is not the best tattoo for you.
Generally, they are seen as a good omen and it is said that once you have one on your body, you will be able to sense things before anyone else does. Which makes them perfect if you make a living out of gambling or stock trading. If this was not the case then they would still be used as inspiration for other tattoos.
There are a few variations of this symbol and some may have additional elements in them, but the most important part is the arrow which shows you which way your life will head in.
You can get weathervane tattoos on any part of your body but it is most often seen on the back or the shoulders.
The symbolism of this tattoo may be different for everyone but in most cases, it is an indicator that you are heading in a positive direction and things are going well for you.
This type of tattoo is very popular with people who love gambling and those who sell stock. Not only because they bring luck to the bearer, but also because they changed their lives and made them into something better than before.
It is believed that once you have this tattoo your life will never be boring or unpleasant. You will always be able to find a way out of any situation no matter what happens.
It is also very popular with those who enjoy just taking their time and thinking about things. Weathervane tattoos will help you find direction in your life and point out ways that you can be happy as well as successful. It will also help you to realize if something is working for you or against you.

what does the roster on the Weathervane tattoos mean?
This dates to a long time ago :
In the 9th century, Pope Nicholas made the rooster official. His decree was that all churches must display the rooster on their steeples or domes as a symbol of Peter’s betrayal of Jesus. In accordance with the decree, churches started using weathervanes with the rooster. farmersalmanac
The roster on weathervane tattoos is the symbol of the betrayal of Peter.