2 very different answers at the same time.
First one is the technical one, based on the price level of the currencies only, then the decoupling will happen pretty soon as something like USD/JPY in theory cannot go to 1 dollar to 1 yen. The problem is that such "in principle" thinking cannot give us any clue where or when the decoupling may happen.
Second one is the fundamental one, which I think the guy got it wrong. Money is a means for the exchange of resources. Real resources I may add. But, the current money system created virtual wealth (or multiplying effect

) through the recycling of money.
The old money (those who has real hard assets) in Europe are actually buying US based assets (including stocks) as the mkt dives. That's why GBP and EUR are under pressure, as no real money exchanged hand, just a very small percent of the hard assets are used as collateral.
I mentioned early last year that old money from Europe is moving out of the US stock market and that will lead to further collapse of the stock market no matter how hard we bounce or even making a new high.
They are back buying the US equities slowly thus the down trend in GBP and EUR. The CFTC report is just on those speculators riding their coattail.
Thus we can tell if decoupling happens in the near future, we are getting the true bottom of the US equities
Think of wave's posts, add the concept of SS's strong hands, and then realize that these old monies are 100 times even more powerful, you can then get the picture.
Here is an example.
10 mil account. 100 mil hard asset. What to do?
1. 10 mil margin long USD 50 mil.
2. Take that 50 mil long US equities, bonds and index products. Just dividend, interest, carry interest, and selling covered calls (on bonds only) alone pay for the holding of the position at 20% plus return a year. Any appreciation on the instruments are bonus. *** risk management the number one priority on all old monies ***
3. For those extra careful clients, a swap is created on the net position in case something goes wrong. That may reduces the return by 1 to 2%.
All I Banks do that for their "super clients". I wonder if they have new tricks now?