Horizontal Line with Level Value?

Hello everyone;

I've searched everywhere and I haven't found this exactly.

I have found this script, but once you move the line, it's value does not change or move with the line.

This is what I would like this for MT4 please:

To be able to draw a Horizontal Line of any length, anywhere on the chart,  that drops the line value number by the line and allows you to, after you drop it, the value number changes and follows the line to wherever you drop it at.

I would appreciate any help.