1st Vertical Line in bottom two charts show risk assets peaking such as Nasdaq and Bitcoin while the top two charts suggest a bottom confirmation by both US dollar and US 10 year treasury bills.
Horizontal line shows major penetration of support and/or resistance for all four charts. Penetration to the upside for top 2 charts, while penetration to the downside for risk assets.
2nd vertical line marks the point of penetration for support and/or resistance.
Why the strong correlation?
Market rotation from risk to safety and there's no other way to buy US treasury bills than to pay with US dollars.