The price of coins on Indodax is determined purely by the supply and demand of sellers and buyers on the Indodax market. If there are many members who buy coins at the same time, then the price of coins on Indodax will increase significantly. Otherwise, if there are many members who sell coins at the same time, then the price of coins on Indodax will decrease. Meanwhile, the price of coins on outside exchanges is determined by buyers and sellers on the exchange. But in general, coin prices on all exchanges are almost the same.