Sharp dip in MAID price

This evening a sharp spike down hit maidsafe prices:

And, while this did not shake me out of my positions, I wonder what the cause was..

Bittrex selling millions of dollars of their customers coins?

https://twitter.com/lumbridgecity/status/977684642131214336

- lumbridgecity

Or was it the AI BOTS going short on Poloniex to hit the stop losses of noob traders?

https://twitter.com/lumbridgecity/status/977685098437935104

- lumbridgecity