Someone with lots and lots of coins is selling into a rising market, and doesn't want to take more than 10% slippage. This seems to have worried the market a bit, and has increased the chances of a moderate correction in the coming days. If there are more big dumps in the next 12-24 hours then we could see a big drop. Or not, chicken entrails are more reliable than tea leaves, the Gods are a bloodthirsty lot.