Die Würfel sind gefallen. — The dice have fallen. DWDS: a decision has been made, it stands. It is the German form of the Latin alea iacta est.
Augen zu und durch. — Eyes shut and through. DWDS describes it as a call, often to oneself or others, to keep going with a task undeterred, regardless of objections, difficult circumstances or bad consequences.
Hin und her macht Taschen leer. — Back and forth makes pockets empty. It is a well-known stock-market saying. It warns against buying and selling again and again, because each change costs fees and often comes at the wrong moment. Some sources attribute the saying to the investor André Kostolany.