There are two types of DCA (Dollar cost averaging ) strategy that traders use

1- DCA into something when it drops down to a key high timeframe zone.

2- DCA into a losing trade.

The worst thing a trader does is DCA into a losing trade. Most of them do it because they just want a bounce from the price so that they can exit at break even.

Try not to add into a losing trade unless you're too sure that you're doing it right. if your mindset is to get a bounce to exit at break even. you should better take that loss.

Always Have an invalidation plan for your trade and just cut it once it's invalidated.