Amazon is heavily shorted by the hedge funds. In addition it is a highly owned stock in many funds. the marginal buyers are little guys. the big holders have no one to sell it to in size. They are feeding it on the market in dribs and drabs. There is currently no market for large sell orders so at some point forced liquidation will hit an air pocket. You have no idea what you are playing with here. This stock is so dangerous, get out if you are a small fry before the big boys are forced to bail.