Not sure what happened with the rating. The episode was much shorter than usual; I wonder if the rating was calculated with all those extra commercials aired during that time slot. Hwayugi, fighting!
18.01.20 Cable Nielsen Ratings
#1 Hwayugi 5.131% (nationwide) 5.044% (Seoul)
18.01.20 Cable TNMS Ratings
#1 Hwayugi 6.1% (nationwide)
#20 Hwayugi rerun 1.6% (nationwide)