With the growing importance of digital technology and the internet, many investors are opting to buy and sell stocks for themselves rather than pay advisors large commissions for research and advice. However, before you can start buying and selling stocks, you must know the different types of orders and when they are appropriate.

Market vs. Limit
The two basic types of orders that every investor should be aware of are the market order and the limit order.

• A market order is an order to buy or sell immediately at the best available price. These orders do not guarantee a price, but they do guarantee the order's immediate execution. Typically, if you are going to buy a stock, then you will pay a price near the posted ask. If you are going to sell a stock, you will receive a price near the posted bid.
  
  One important thing to remember is that the last-traded price is not necessarily the price at which the market order will be executed. In fast moving and volatile markets, the price at which you actually execute (or fill) the trade can deviate from the last-traded price. The price will remain the same only when the bid and ask prices are exactly at the last-traded price.
  
  Market orders are popular among individual investors who want to buy or sell a stock without delay. Although the investor doesn't know the exact price at which the stock will be bought or sold, market orders on stocks that trade over tens of thousands of shares per day will likely be executed close to the bid and ask prices.
  
  
• A limit order sets the maximum or minimum price at which you are willing to buy or sell. For example, if you wanted to buy a stock at $10, you could enter a limit order for this amount. This means that you would not pay a penny over $10 for the particular stock. It is still possible, however, that you buy it for less than the $10.

One Caveat (Beware)
When deciding between a market or limit order, investors should be aware of the added costs. Typically, the commissions are cheaper for market orders than for limit orders. The difference in commission can be anywhere from a couple dollars to more than $10. For example, a $10 commission on a market order can be boosted up to $15 when you place a limit restriction on it. When you place a limit order, make sure it's worthwhile.

Let's say your brokerage charges $10 for a market order and $15 for a limit order. Stock XYZ is presently trading at $50 per share and you want to buy it at $49.90:

By placing a market order to buy 10 shares, you pay $500 (10 shares x $50 per share)+ $10 commission, which is a total of $510. By placing a limit order for 10 shares at $49.90 you pay $499 + $15 commissions, which is a total of $514.

Even though you save a little from buying the stock at a lower price (10 shares x $0.10 = $1), you will lose it in the added costs for the order ($5), a difference of $4. Furthermore, in the case of the limit order, it is possible that the stock doesn't fall to $49.90 or less. Thus, if it continues to rise, you may lose the opportunity to buy.