This is the good old strategy of spoofing and odd lots to get people out of the way so they can walk it up or down. Then they get the indications of interest from a dark pool and print the size order. Funny thing is you cant participate in this strategy to get the size because its off exchange. Alot of the time there is hidden liquidity and these big prints will go right though. Back in the old days early 2000s this was all done on the lit markets before dark pools. They would walk these illiquid stocks up or down and then brut island arca would just keep following as they walked them up. They get it high enough blast a sell order on the algos that follow them and boom cancel all the orders. Wash rinse and repeat.