There are only a few way of doing this.
A process where you update a value on screen 2
1: into a database / file, or
2: as a symbol in Webflow
and that value is displayed on screen 1.
To do this:
It really depends on how much time, energy, and money you want - and are able to put into performing the task.
This is what you would need to do:
Write a small PHP script to capture a value from screen 2 and write that value to
- a MySQL database, or to
- an XML file.
Another script would then read the value from the
- MySQL database, or from
- an XML file
every time a viewer see's screen 1.
You need to know
- PHP, and (SQL or XML) (or hire someone who does) and
- you need to self-host as the application would need to be exported and served from your own server.
However, the upcoming / not yet released Webflow CMS feature be may be able to accomplish this for you.
As a Application Developer... I can say this task is not difficult. It's actually pretty easy. On a scale of difficulty ranging from 1 to 10... this is less than a 1.
If I instead put on my Designer only hat... and assume that I know nothing about PHP, SQL, XML, Hosting, Domain Names and list of other technologies - I may say this "basic developer task" is beyond the reach of most people. But it is learnable over time.
As an Application Developer and Designer... this task is simple. But if you don't know the technologies... you've got to hire someone - and that's where the money comes in.
The method that @vincent stated... could actually work. It's kind of a "work-around"... but again - it could actually work.
It would involve these steps:
1) Screen 1 displays a symbol.
2) Screen 2 is where you change the symbol.
3) Use Webflow to update the value of the symbol in Screen 2 whenever you need the value to change.
4) Publish the newly changed site.
5) Every time a viewer visits your site... they see the value of the symbol.
Obviously, this would not display "real-time"...
But it completely eliminate the money, PHP, SQL, XML, self-hosting. ... basically the technologies required to make the displayed value "real-time".
Hope this helps.