Only total speculation

a) someone (mm) is big short buys in GER throws in US for big sell-off (did alredy happen wihout success on some occasions IMO)

b) someone has placed a big order with mm @ agreed price (mm tries to collect and make some money below the agreed price)

c) Leckrone is buying through his UK relation in GER

d) someone wants to generate attention and has a bis volume to sell

e) just mm´s play

sure there will be lots of other speculations as well!!!