It's possible to display the realtime speed (and much more) of any player who is connected to your server.
Create an event to display a button like this:
openButton( GetCurrentPlayerVar("UserName"), "follow_speed_2",11,124,22,5,5,2,80,"^7" . GetPlayerVar( $uName, "InstantSpeed") . " " . GetPlayerVar( $uName, "UnitSpeed"),test_follow );
$uName should be replaced with the username you want to view the speed from
test_follow , means that after 2 seconds (which is the 7th value in the button code) the button will redirect the code to that event.
Now you will see the speed of that player which is updated every 2 seconds.
I made some testcode for that back in the days, which looks like this:
You get a list of every player connected to the server and press 'Follow player' button behind the name of the person you want to follow.
The text of the button becomes green, to indicatie who you are following (if you press that again, you will stop following that person).
Once you close the main screen, a small window is brought up, that shows you the current speed, current sector, current node and the gap before and behind the selected player. All that information is updated every 2 seconds.
I'm not going the share the whole code, as it is relatively easy to make once you know the basics of Lapper.
If you don't know the basics of Lapper yet, this will be a good exercise to learn them.
There's enough explanations and examples on this forum to get you going.