Just join poloniex couple days ago, my question is how can i know if there's a new coin open for trading market? suddenly i see new coin and the price was already risen
By the time you know there will be a coin listed there it has already been pumped significantly making you buying basically too high. It's basically the same with coin pumpers. They first buy at low prices and then announce the pump where people like you buy their expensive coins and making the price go up.