yeah so start point will be your sword tip (get world location of the socket at the end of the sword)
then get your actor forward vector, * by maybe a float variable (easy to change) set it to 100.
then add that to the socket location (worldspace)
plug that into End
what that will do is fire 1 metre ahead (yeah too far but test it works at a distance then closer)
then lower that 100 til you get what you want as far as range is conceerned
make sure you only fire the trace when the sword is all the at the end of its hit animation!