Pump is a term that has a tendency to go up with an unusually high volume of sales, usually the Pump happens when the shark appears and wants that coin to go up and collect. attract small investors and let them swing.
     Dump is the time when the small traders were trapped, they sold that coin, obviously when the amount of coins sold is too much and no one buys, the coin will surely fall miserably.
      This is also the most dangerous game that the shark created, the dump / pump shark is unpredictable, so the combination with technical charts and some signals of the market to help the home. Small investments do not become the prey of sharks.