Dpo is generaly use to find cycles in the market rather than prices trends.
As you can see a centralized Dpo is ploted with barsback *actual is shown behing actual price timeline.
Using timeline diferences between the two last highest or the two last lowest histogram bands can give you an aproximation of those market cycles.
Dpo SMA's trends can also be use to compare actual price timeline direction in 3 ways...
#-1: Is the actual price (candles) trend is against or with the dpo SMA's (convergence;divergence) ? #-2: Is the actual price trend is condensed or dispersed ( criticals values)? #-3: Does the dpo SMA's are near or far from the dpo cycle bottoms or cycle tops ?
Make sure to know that this indicator isn't a trading reccomandation and may not be suited for your trading style as well that it can be badly interpreted. USE WITH CAUTIONS !