But for real, DCA usually implies one has a choice. "Do I lump sum this or DCA?" In this case, I don't have a lump sum, I just add money from my paycheck every month.
If I did have a lump sum to put into the market, I would not DCA since DCA does worse ~66% of the time. Most of the time, one would be better off putting the entire sum into the market all at once.