All of these factors must be considered before choosing an online broker. Do you want to trade or invest? Do you want a great mobile app to check your portfolio wherever you are? What types of assets are you looking to invest in? Answering these questions is not always easy. You can check out our guide to choosing a stock broker to gain further insight so you can make a sound decision. Once you've made a decision on a broker, you can also check out our guide to opening a brokerage account.
Commission prices are the key advantage of online discount brokers. Consider that a popular full-service brokerage firm charges a minimum of $50 just to buy or sell stock. The commission is variable, so the larger the order, the larger the commission. To buy or sell $10,000 of stock, a client would pay $80. On a $25,000 order, the commission surges to $205 -- and commissions for funds can be even higher.

Fees beyond trade commissions include inactivity fees (common with active trading brokers such as Interactive Brokers, Lightspeed, and TradeStation) and IRA fees for having a retirement account. While most brokers do not charge predatory fees, it’s still important to do your due diligence. Just like a bank account, stock brokers also make a portion of their profits off miscellaneous fees.

The commission structure for options trades tends to be more complicated than its equivalent for stock trades. Until the commission cuts that swept the industry in the fall of 2019, most brokers charged a fee for each leg of an options spread, plus a commission per contract being traded. The per-leg fees, which made 2- and 4-legged spreads expensive, have been eliminated for the most part. We are seeing some brokers place caps on commissions charged for certain trading scenarios. 
While that may sound like outdated advice, in late 2012, an American marketing executive explained how he had turned $20,000 into $2 million during the recession. Chris Camillo explained that Wall Street is quite homogenous and tends to be behind the curve on trends involving females, young people and those on low incomes. Camillo invested in stocks that anyone could have, he just spotted trends before the investment bankers did and was able to make some very sizable profits.
An independent trading platform is used for visualising market data and managing your trading, but it needs to connect to one or more brokers to actually place a trade on the market. These professional day trading platforms typically offer a more advanced interface than that of the average brokerage, and help you to find and place trades with one or more brokers of your choosing. Using an independent trading platform you don’t have to relearn a whole new software just because you change to a different broker.

The IBRK Lite plan enables affordable investing with no commissions and no account minimums on its stocks and ETFs. Its Pro plan is for the regular investor, with specific fees based on your investment activity. Research and education are impressive, with its Traders’ Academy offering free courses and several applications designed to help you make better investments. 
Features: Now that most online brokers don't charge commissions, it's more important than ever to compare the features you get. Some online brokers have tons of research available, educational tools to help you learn how to invest, and more. These can be very valuable assets for beginning investors, so keep this in mind when comparing brokers. After all, if the cost of investing is the same (zero) at most online brokers, you might as well get as much value for your money as possible.
Leverage simply means the use of borrowed money to execute your stock market strategy. In a margin account, banks and brokerage firms can loan you money to buy stocks, usually 50% of the purchase value. In other words, if you wanted to buy 100 shares of a stock trading at $100 for a total cost of $10,000, your brokerage firm could loan you $5,000 to complete the purchase.
The best way to practice: With a stock market simulator or paper-trading account. Many brokers offer these virtual trading platforms, and they essentially allow you to play the stock market with Monopoly money. Not only do you get to familiarize yourself with trading platforms and how they work, but you also get to test various trading strategies without losing real money. The link above has a list of brokers that offer these play platforms.