Bitcoin Forum

Poloniex pumps and dumps are done from the inside. Here's how I know.

There's a person (or bot) sitting in Poloniex and he is looking at all the account balances. When he sees that relatively small amounts are left for a certain coin, he pumps that coin. Once sufficiently many people buy in, he stops the pump. He knows exactly how many coins each person has on poloniex as he has full access to the entire Poloniex database. Then he dumps the coin, and waits until people sell at a loss.

I made two buys at Poloniex for recently dumped coins at significant positions. I sold the first coin after five days, and the second coin after seven days, both at a loss. The exact moment I exited my position (to the minute), both coins got pumped more than 70%.

Poloniex is a scam, and it should be reported to SEC.

No, there is no evidence for your thesis. But what happened in around middle of the year, was many DDos attacks on poloniex during pumping dumping coins, so that users couldn't buy/sell them. The fast dumping pumping is also caused by trading bots. As I remember right, poloniex has forbidden them in their rules.
Day trading on cryptocurrencies is not senseful in my opinion. I research the currency and keep it for at least a few weeks.

Yes, i remember that, it happened to me when I tried to sell ripple. All trades stuck, no one couldn't sell anything but someone dump his ripple bag. It was very weird pump and dump if you ask me or any other trader who was there that day. I believe everything is possible, we don't really know what is going on behind scene.

I experienced it in a different exchange, so does it mean it's an insider trading as well and a scam? I understand your point but your experience (nor mine or others) isn't enough proof unless you're working there and know if it really works that way.