Its clear with the XMR exit pump in August and recent trading on margin alts that Poloniex is a rigged market operating an internal MM system engineered specifically to margin call over-leveraged traders. This is on $BTC exchanges as well which is nothing new but still disconcerting considering crypto markets are generally operated purely by retail traders and very few if any institutional funds. For the market to mature this will have to transition to an orderly market which will likely occur through regulation much like what the equity markets went through in the 1930s; hard to tell when the government will actual proceed with action though since the space is so new and generally the SEC does not move quickly.