The Australian Institute of Sport scholarship holder started her World Championship campaign brilliantly, winning a bronze medal in the 1500 metres on the opening day, and continued her good form over the remainder of the three-day meet.
Lockett, from Queensland, finished sixth in the 500 metres, ninth in the 1000 metres, and then capped off her weekend with third place in the 1500 metres Super Final, although this race was not for medals.
On combined results she finished as the fourth best skater, a position which thrilled Australian team coach, Ann Zhang.
"Deanna's fourth place in the overall rankings is the best place ever by an Australian," Zhang said.
"I am very happy with her results, as she was up against 66 skaters, and finished behind two Koreans and a Chinese."
Of the other Australians competing in Poland, Pierra Boda had a great final day, finishing 13th in the 1000 metres and moving his ranking to 18th overall.
Armstrong Lazenby was 43rd in the 1000 metres (30th place overall), while Nate Henry was 31st in the 1000 metres (37th overall).
While the short track season has come to a close for Australia's junior skaters, Julie Jung will contest the senior World Championships in Debrecen, Hungary, beginning on March 8.