Ok i was watching some dump and pump channels on telegram there are some guys they seems to be from Rusia they write his signals messages in Russian and english they use many channels and have many subscribers more than 100k maybe they made count down until the pump on the last signal message they write the name of the coin to pump and say buy and buy and hold for less the 10 minutes it doesn't work because they buy the coin before to write the name of the coin on his signal message the coin grow up before the signals and they just use his subscribers to get profit i think it could work giving the name of the coin and  placing buy orders and sell orders  at the same price  it could give the same profit for all