How to Buy Stock Online Immediately

Sign up for an account through an on-line brokerage company. There are links to 'E*TRADE,' 'ShareBuilder' and 'Zecco' below, but there are many more to choose from. Click 'Sign Up,' and follow the prompts to complete your registration.
Transfer money into the brokerage account. This will normally take one business day to be processed and appear in your account.
Once the money has posted to your account, find the ticker symbol of the stock you want to buy on the site's research page. Once you know the symbol, go to your site's quotes page, type in the symbol and click 'Get Quote,' or your site's equivalent.
Select 'Buy' once the quote comes up. Select the amount of shares you would like to purchase. Then you will be asked if you would like to place a market order or a limit order. With a limit order, you set the exact price you want to pay. A market order buys the stock at the price sellers are asking at the moment.
Confirm the trade when your site asks you to, and in a moment you will receive a notification that your trade was accepted or declined. Your trade will usually only be declined if you do not have enough funds to cover it.

How to Buy Royal Caribbean Stock

Open a stock brokerage account if you do not already have one. Your bank may offer brokerage services, or you can visit the local office of a full-service brokerage firm. As an alternative, online discount brokers let you buy and sell shares through an online account access. Online commissions range from $5 to $10 each time you buy or sell. Commission rates for a live broker will be significantly higher, but the broker will handle all of the required paperwork.
Transfer some money into your brokerage account. Account funding minimums range from zero to several thousand dollars. You can send in money by check, wire transfer or set up Automated Clearing House payments. ACH transfers take a couple of days to clear, but cost nothing. Once they are set up, you can move money in either direction.
Look up the Royal Caribbean share price. Use the RCL stock symbol to find the current price using either your online account screen or one of the major financial websites.
Determine how many shares you would like to buy. In most cases, you can only purchase whole shares, one or greater. Multiply the number of shares times the share price plus the commission rate to get the total cost. For example, in July 2014, RCL was trading at about $60 per share. With a $10 commission, 15 shares would cost $910 and 200 shares would be $12,010.
Submit a buy order for the number of shares you want using either the online trading screen of your discount brokerage account or by calling your broker and telling her to buy the shares for you.
Verify with your broker or online that the shares have been purchased and at what share price. It only takes a few seconds to complete a stock purchase. However, the share price fluctuates constantly throughout the market hours, so your actual purchase price may be a little higher or lower than the price shown online before you placed the order.