Not everyone who buys and sells stocks is a stock trader, at least in the nuanced language of investing terms. Most investors fall into one of two camps. Depending on the frequency in which they transact and the strategy driving their actions, they’re either “traders” (think Gordon Gekko in the movie “Wall Street”) or “investors” (as in Warren Buffett).
Passive investing is what long-term investors do — and the intent behind their actions is very different. Their approach to buying and selling stocks is considered passive in that they tend not to transact often. Instead of relying mostly on technical analysis (as active traders do) and trying to time the market, passive investors use fundamental analysis to carefully examine the strength of the businesses behind the ticker symbols and then buy shares with the hope that they’ll be rewarded over years — decades, even — through share price appreciation and dividends.

TD Ameritrade has been a powerful player in the online stock trading ecosystem for years. The flipside to such robust platforms? Cost. Even though TD Ameritrade lowered its fees in 2017 from $9.99 to $6.95, pretty much every other major discount broker slashed its prices, too. TD Ameritrade remains one of the more expensive options out there, even with more than 100 commission-free ETFs. Though its pricing structure is more expensive than those of some of the other discount brokers, there are many traders who think it's a best-in-class trading platform.
Learning about the greatest investors of years past will provide perspective, inspiration, and appreciation for the game which is the stock market. Greats include Warren Buffett, Jesse Livermore, George Soros, Benjamin Graham, Peter Lynch, John Templeton and Paul Tudor Jones, among others. One of my favorite book series is the Market Wizards by Jack Schwager.
If you’re trying your hand at stock trading for the first time, know that focusing on anything but long-term results will expose you to frequent bouts of agita. Most investors are best served by keeping things simple and investing in a diversified mix of low-cost index funds to achieve — and this is key — long-term outperformance. Because, oof… the short-term ups and downs in the market can be brutal.
It's crucial to educate yourself before you wade into any type of investment or investment strategy. This beginner's guide to online stock trading will give you a starting point and walk you through several processes: choosing a discount broker, the 12 types of stock trades you can make, how to select individual stocks, uncovering hidden fees, expenses, and commissions, and much more. 

How much money should I invest in stocks? If you’re investing through funds — have we mentioned this is our preference? — you can allocate a fairly large portion of your portfolio toward stock funds, especially if you have a long time horizon. A 30-year-old investing for retirement might have 80% of his or her portfolio in stock funds; the rest would be in bond funds. Individual stocks are another story. We’d recommend keeping these to 10% or less of your investment portfolio.