Yep DDO have preset for UE4, Worgage you have to use it 
Then you will have 4 maps: albedo, metallic, roughness and normal map:
Keep in mind the roughness map is the inverse of the gloss map (the more it is black the more the surface is smooth)…in UE4, keep the roughness and the metallic as linear state (no RGB for these maps).
Also, take care of the normal map, in the UE4 engine, the normal map has to be inverted (i mean take care of the green channel). Make some test in the editor with a light if you are not sure…sometimes you will see the up/bottom direction of the light (green channel) are inverted.
Enjoy!