Hi,
"This functionality is standard in ERP WM, difference indicator servers the purpose by linking it to movement type. How about the same in EWM?"
No, you do not have this in EWM and this is because the connection to IM is totally different. That the difference is posted to a special storage type is due to that every IM posting leads to a quant creation (negative or positive) in WM. In EWM differences always go to a difference account (which you can see in the difference analyzer).
Brgds
Juergen