ok problem solved. thanks 

Please watch video and configure Content egg

https://rehubdocs.wpsoul.com/docs/rehub-theme/affiliate-settings/content-egg-plugin/

Hello

You can see on this page : https://rankor.fr/or/   products at the bottom. the "Acheter Maintenant" button do not link to the best price from ContentEgg but rather to the previous product link from the demo theme. 

And also why the third product do not show this "acheter maintenant" icon ? 

thank you