In addition to attractive pricing, Ally offers a quality platform that gives you access to the entire universe of stocks and ETFs. Where some discount brokers focus on only one kind of trader (for example, options traders or high-net-worth investors), Ally Invest provides an excellent experience for investors of all kinds. A focus on discounted costs can sometimes be a red flag for quality, but Ally truly delivers with sophisticated calculators, profit-loss estimators, and more. Ally also offers a robust research library that incorporates visual slides and interactive media into its market data.
If you want to trade “futures” (agreements to buy or sell assets in the future), Ally Invest isn’t an option. That’s not unusual for an online stock broker — neither Robinhood, Vanguard, nor Fidelity offer futures trading — but you can do it with some of our other top picks, including E*TRADE, Charles Schwab, Interactive Brokers, and TD Ameritrade.
At $4.95 per trade, with no inactivity charge and a $50 full outgoing transfer fee, Ally Invest’s fee structure is about as low as you'll find. Even though a rash of brokers dropped their commissions in 2017 to be competitive with Ally Invest’s $4.95 flat rate, Ally keeps its edge with a zero account minimum and enticing discount for active investors — equity trades drop to $3.95 for users with 30-plus trades each quarter or a balance of $100,000.
Stock mutual funds or exchange-traded funds. These mutual funds let you purchase small pieces of many different stocks in a single transaction. Index funds and ETFs are a kind of mutual fund that track an index; for example, a Standard & Poor’s 500 fund replicates that index by buying the stock of the companies in it. When you invest in a fund, you also own small pieces of each of those companies. You can put several funds together to build a diversified portfolio. Note that stock mutual funds are also sometimes called equity mutual funds.
Practice, practice, practice. But not with real money. There’s nothing better than hands-on, low-pressure experience, which investors can get via the virtual trading tools offered by many online stock brokers. Paper trading lets customers test their trading acumen and build up a track record before putting real dollars on the line. (Several of the brokers we review offer virtual trading, including TD Ameritrade and Interactive Brokers.)
With cutting-edge research tools and mobile apps, online stock trading is perfect for investors who want to strike out on their own with “self-directed trading” instead of paying fees for a managed portfolio. Whether you’re a first-time investor or an expert trader, you need a trading platform that’s user-friendly, trustworthy, and packed with data visualizations. To find the best online stock trading sites of 2019, we analyzed 25 of the most popular platforms and tapped into the expertise of a former day trader, a stock analyst, and a financial commentator with more than two decades of trading experience. In short, there is no single best online stock broker, but each of our top picks has its own strengths for different types of investors. We’ll help you determine the best fit for your investment goals and experience.
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Prior to investing in a managed portfolio, E*TRADE Capital Management will obtain important information about your financial situation and risk tolerances and provide you with a detailed investment proposal, investment advisory agreement, and wrap fee programs brochure. These documents contain important information that should be read carefully before enrolling in a managed account program. Please read the E*TRADE Wrap Fee Programs Brochure for more information on the advisory fee, rebalancing methodologies, portfolio management, affiliations, and services offered.

If you’re an active, high-volume trader who dabbles in all kinds of assets, Interactive Brokers is a great option, since you can trade just about anything without losing $5 to $7 on every transaction. The platform interface isn’t nearly as user-friendly as Robinhood’s, nor as intuitive as TD Ameritrade’s; however, if you’re the kind of investor who’d benefit the most from Interactive Brokers (i.e., an experienced one), you’ll know your way around a candlestick chart already.
When you've been approved for margin stock trading, you're also eligible to short stock. Almost every successful stock trader has shorted stock at one time or another. When you short stock, you make money when the company's shares fall—or, even better yet, when they crash. The problem is that you can expose yourself to unlimited liability when you do this. 
Choose your trading partner wisely. To trade stocks you need a broker, but don’t just fall for any broker. Pick one with the terms and tools that best align with your investing style and experience. A higher priority for active traders will be low commissions and fast order execution for time-sensitive trades (like our picks for best online platforms for active traders/day traders). Investors who are new to trading should look for a broker that can teach them the tools of the trade via educational articles, online tutorials and in-person seminars (see NerdWallet’s round-ups for the best brokers for beginners). Other features to consider are the quality and availability of screening and stock analysis tools, on-the-go alerts, easy order entry and customer service.
Keep your perspective. Being a successful investor doesn’t require finding the next great breakout stock before everyone else. By the time you hear that XYZ stock is poised for a pop, so have thousands of professional traders and the potential likely has already been priced into the stock. It may be too late to make a quick turnaround profit, but that doesn’t mean you’re too late to the party. Truly great investments continue to deliver shareholder value for years, which is a good argument for treating active investing as a hobby and not a Hail Mary for quick riches.
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The solution to both is investing in stock index funds and ETFs. While mutual funds might require a $1,000 minimum or more, index fund minimums tend to be lower (and ETFs are purchased for a share price that could be lower still). Two brokers, Fidelity and Charles Schwab, offer index funds with no minimum at all. Index funds also cure the diversification issue because they hold many different stocks within a single fund.
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