Looks to me like a destructive kid burning money in a hacked account.
This serves no purpose. You can't identify a trend with it, since bots or bored day-traders will compensate. At best, it produces pointless trading volume.
Could be either a bug in one bot, an unintentional bug between two bots, or one bot gaming another to intentionally drain it. Or an API key(s) stolen from some service (eg bitcoinbuilder.com) which stores them.