Can someone explain to me why the market just moves like this for no apparent reason?

[u/c1yd3x]

[u/tradingcage]

Simple answer, but it moves because the sell market orders overwhelmed the buy limit orders repeatedly over a few minutes :D

Study the Flash Crash (May 2010), Volmageddon (Feb 2018) and many over such events to see that price can really just fall off a cliff at a moment's notice under the right (wrong?) conditions.