How to trade multiple pairs, in parallel, the second part

We have three charts, and the most important is the DOLLAR INDEX chart and its direction of movement:
In the first chart, here we see that the dollar index is in a bearish trend,
In the second chart, here we see that EURAUD monitors the movement and mostly coincides with the chart DOLLAR INDEX,
In the third chart, here we see that EURUSD is totally the opposite of the DOLLAR INDEX chart.

We see that when the DOLLAR INDEX falls, also and the EURAUD, while the EURUSD rises.

This way, you can combine these pairs.
What do you think about that?