Segment that collects the same value on two screens
Hello, in an ecommerce app, I have a cart screen (which is optional to visit), and also a purchase confirmation screen. On both screens an eVar is defined that informs the selected product. I would like to know how it is possible to obtain the visits to the purchase confirmation page that have gone through the cart and that on both screens the product is the same (regardless of which one it is). That is, understand how to know that this "dynamic" value is the same on both screens.
Thank you