Here is a small tutorial showing how to use math and Ue4 to create cool effect without using external software. I hope you'll enjoy it ! :)
Let me know if you have any question.
Project : https://drive.google.com/file/d/1Kk5l...
PS : You can change the TexCoord to ScreenPosition to remove this Distortion effect due to the ScreenScale. That mean that value wont be between 0-1 but 0 - ScreenResolution.
UE4 Tutorial - Create 2D Line with Material