It would be good to ask yourself how to trade bitcoin before you start trading. All transactions on the exchange, as well as bitcoin trading, are made trading bitcoin. An order is a buy/sell order. Orders are different. The main and most common ones are market, limit and stop losses. For example, you bought a part of bitcoin for $500 at the market price of the coin at $6,600. This will be a market order – the usual buy/sell at current prices.