Whether you get an online quote can depend on the investment you’re trying to buy or sell, and on the liquidity or volume of shares dealt each day on the exchange. You’ll get an online quote for the vast majority of deals. But if your order is for a relatively high value in a mid- or small- cap company, you may not always get a quote – or you may get a quote outside the current market buy or sell price (this is known as depth pricing).
Online quotes state the best price available for the investment at that time, based on the size of orders on the exchange order book. Before you accept an order, have a look at the quoted price, and make sure you’re happy with it.