Definition of day trading
"The American ""Security Exchange  Commission"" has imposed a rule upon all stock trading accounts. This rule is ""Regulation-T"". This rule specifies that stock trading accounts must be permitted three days after the termination of a trade to settle the account. This is just fancy lingo to justify the guarantee that the funds are either transferred out of your account to another persons  (the person that made money), or the money flows into your account.  A ""Day Trader's"" account avoids the hassle because you're borrowing money from your broker to trade with and circumvent Reg-T.  It's technically not how long you hold the trade that determines if you're a day trader, or not. It's your accounts liquidity and your credit worthiness."
"You have already indicted in another question, titled Which risk did I take winning this much?, that you did not understand (1) Why a previous trade made you as much money as it did; nor (2) How much you could have lost if things went a different way. You were, in that other question, talking about taking short position, without understanding (apparently) that a short position can create losses exceeding the value of your initial investment. Can one make money doing day trading? Yes, an educated investor may be able to prudently invest in short term positions making knowledgeable judgments about risk, and still make money. Can you make money doing day trading? Well, maybe. You have in the past, in what you described in a previous post as ""winning"". So even in your own eyes, you were effectively gambling, and got lucky. Perhaps the more relevant questions you can ask yourself are: Can you lose money doing day trading? And, most importantly, Are you more likely to lose money day trading, or consistently make money by taking on reasonable and educated risks?" This happens on dark pools quite often. If I am a large institutional investor with tens of millions of shares, I may want to unload slowly and limit the adverse affects on the price of the stock. Dark pools offer anonymity and have buyers / sellers that can handle large volume.  In the case of a day trader, they often trade stocks with light volume (since they have large fluctuations that can be quite profitable throughout the session). At the end of the session, many traders are unwilling to hold positions on margin and want to unload fast. Investopedia defines it in the following way: It's essentially a market order that doesn't get entered until the last minute (or thereabouts) of trading. With this type of order you are not necessarily guaranteed the closing price but usually something very similar, depending on the liquidity in the market and bid-ask for the security in question. Traders who believe that a security or market will move more heavily during the last few minutes of trading will often place such an order in the hopes of having their order filled at a more desirable price. "Sorry but you already provided the answer to your own question.  The simple answer is to 'not day trade' but hold things for a longer period and don't trade a large number of different stocks every week. Seriously, have a look at the rules and see what it implies.. an average of 20 buys and sells of longer term positions PER DAY is a pretty fair bit of trading, that's really churning through the positions compared to someone who might establish positions with say 25 well picked stocks and might change even 5 of those a week to a different stock.  Or even a larger number of stocks but seeking to hold them for over a year so you get taxed at the long term cap gains rate. If you want to day trade, be prepared to be labeled as such and deal with your broker on that basis.  Not like they will hate you given all the fees you are likely to rack up.  And the government will love you also, since you'll be paying short term gains taxes.  (and trust me, us bogelheads appreciate the liquidity the speculative and short term folks bring to the market.) In terms of how it would impact you, Expect to be required to have a fairly substantial balance ($25K) if you are maintaining a margin account. I'd suggest reading this thread My account's been labeled as ""day trader"" and I got a big margin call. What should I do? What trades can I place in the blocked period?" Pretty sure the null hypothesis here is that trading equities at a high frequency is a zero sum game.   The is no gain that isn't someone else's loss.  No goods are created, no knowledge is gained, no value is produced.  Note, I didn't say value is destroyed either. You need to contact the trading company and ask them what's going on. If it's simply a matter of needing to add more cash because you are now classified as a day trader, then call them, ask them what you need to do to not be considered a day trader, and do that. It would likely consist of not trading for a week and then trading less than you were going forward to avoid getting classified as a day trader again.  That would be the easy problem to solve, so I hope that's right. The problem is that while there are a lot of statistics that can be created from basic market data such as prices and volume, along with the fundamentals of the company, I think that if you talk to 8 different day traders, you'll get 12 different theories of how to interpret and trade based on those numbers.  Also quite likely, the more successful someone is at day trading, the more closely they are likely to guard their secrets and not want to divulge them. If there was any uniform concensus, they you'd see all the daytraders doing the same thing, and moving as a group, shortly after which you'd get 'contra' folks who would try to gain by moving in opposition, or 'predicta' folks who would try to front-run the pack. and.... (I think you can see where this leads)  A better idea might be to just work on educating your-self firstly with regard to nomenclature and terms, and then move on to reading some stuff about how markets work   etc.  I'd suggest starting with a book like 'Wall Street Words' and/or 'A Random Walk Down Wall Street' since both are great introductions to things, and move on from there.  Note that both of those books have gone through multiple editions, so be sure to get the most recent one (especially if you are trying to save money and buy a used version)   You are also likely to find an nearly endless supply of 'seminars' that will offer to teach you somebody's proven method for a fee, or for 'free' but after which you find our you need to use their special tools or data sources etc (which cost money) to use their 'system'  (either of which makes me think that their system can't be that great if they figure it's a surer thing to charge for 'teaching' or 'tools/services' than it is to use their system, otherwise they'd just shut up, practice what they preach and make money that way instead)  It might be worth attending the free ones just to get exposure to someone's theory on how to game the system, provided you are 'not an easy mark' and can withstand the high pressure sales pitch for their books/software/services etc that pays their bills and almost invariably comes along with such a seminar. "There are people (well, companies) who make money doing roughly what you describe, but not exactly. They're called ""market makers"". Their value for X% is somewhere on the scale of 1% (that is to say: a scale at which almost everything is ""volatile""), but they use leverage, shorting and hedging to complicate things to the point where it's nothing like a simple as making a 1% profit every time they trade. Their actions tend to reduce volatility and increase liquidity. The reason you can't do this is that you don't have enough capital to do what market makers do, and you don't receive any advantages that the exchange might offer to official market makers in return for them contracting to always make both buy bids and sell offers (at different prices, hence the ""bid-offer spread""). They have to be able to cover large short-term losses on individual stocks, but when the stock doesn't move too much they do make profits from the spread. The reason you can't just buy a lot of volatile stocks ""assuming I don't make too many poor choices"", is that the reason the stocks are volatile is that nobody knows which ones are the good choices and which ones are the poor choices. So if you buy volatile stocks then you will buy a bunch of losers, so what's your strategy for ensuring there aren't ""too many""? Supposing that you're going to hold 10 stocks, with 10% of your money in each, what do you do the first time all 10 of them fall the day after you bought them? Or maybe not all 10, but suppose 75% of your holdings give no impression that they're going to hit your target any time soon. Do you just sit tight and stop trading until one of them hits your X% target (in which case you start to look a little bit more like a long-term investor after all), or are you tempted to change your strategy as the months and years roll by? If you will eventually sell things at a loss to make cash available for new trades, then you cannot assess your strategy ""as if"" you always make an X% gain, since that isn't true. If you don't ever sell at a loss, then you'll inevitably sometimes have no cash to trade with through picking losers. The big practical question then is when that state of affairs persists, for how long, and whether it's in force when you want to spend the money on something other than investing. So sure, if you used a short-term time machine to know in advance which volatile stocks are the good ones today, then it would be more profitable to day-trade those than it would be to invest for the long term. Investing on the assumption that you'll only pick short-term winners is basically the same as assuming you have that time machine ;-) There are various strategies for analysing the market and trying to find ways to more modestly do what market makers do, which is to take profit from the inherent volatility of the market. The simple strategy you describe isn't complete and cannot be assessed since you don't say how to decide what to buy, but the selling strategy ""sell as soon as I've made X% but not otherwise"" can certainly be improved. If you're keen you can test a give strategy for yourself using historical share price data (or current share price data: run an imaginary account and see how you're doing in 12 months). When using historical data you have to be realistic about how you'd choose what stocks to buy each day, or else you're just cheating at solitaire. When using current data you have to beware that there might not be a major market slump in the next 12 months, in which case you won't know how your strategy performs under conditions that it inevitably will meet eventually if you run it for real. You also have to be sure in either case to factor in the transaction costs you'd be paying, and the fact that you're buying at the offer price and selling at the bid price, you can't trade at the headline mid-market price. Finally, you have to consider that to do pure technical analysis as an individual, you are in effect competing against a bank that's camped on top of the exchange to get fastest possible access to trade, it has a supercomputer and a team of whizz-kids, and it's trying to find and extract the same opportunities you are. This is not to say the plucky underdog can't do well, but there are systematic reasons not to just assume you will. So folks investing for their retirement generally prefer a low-risk strategy that plays the averages and settles for taking long-term trends." Day trading is probably the most often tried and failed activity in the financial world. People think they can parlay $1,000 investment into $1,000,000 in a week with little or no knowledge on how to evaluate stocks and or companies. They think they can just look at where the line graphs' been and forecast where it's going to be next week. Unfortunately if it were that simple everyone would be making money hand over fist in the market.   So in short, the reason day trading is considered a risky venture is because most of the people that attempt to do it are willfully ignorant. They intentionally choose not to read about day trading. They intentionally choose not to learn about how to read a company's financial report and they intentionally choose not to learn how to compare one stock to another. They also don't consider the fact that most of their data is 15 or more min old because of the shady rules brokers have worked into the system.  Real everyday investors that make money in the market do it by careful evaluation of the purchase they are about to make. Guess what, even they lose time to time. That's the game! The futures market trades 24 hours a day, 5.5 days a week. S&P 500 futures market continues trading, and this gives pricing exposure and influences the individual stocks when they resume trading in US session. I would suggest following your quote and having a read of the web page supplied, that buys then sells or sells short then buys (the same security on the same day) four or more times in five business days, ... So it is a two way transaction that counts as 'one'. "This is called ""change"" or ""movement"" - the change (in points or percentage) from the last closing value. You can read more about the ticker tape on Investopedia, the format you're referring to comes from there." "Trading at the start of a session is by far higher than at any other time of the day. This is mostly due to markets incorporating news into the prices of stocks. In other words, there are a lot of factors that can affect a stock, 24 hours a day, but the market trades for only 6.5 hours a day. So, a lot of news accumulates during the time when people cannot trade on that news. Then when markets finally open, people are able to finally trade on that news, and there is a lot of ""price discovery"" going on between market participants. In the last minutes of trading, volumes increase as well. This can often be attributed to certain kinds of traders closing out their position before the end of the day. For example, if you don't want to take the risk a large price movement at the start of the next day affecting you, you would need to completely close your position." There are classes of 'traders' who close their positions out every evening, not just on fridays.  But their are other types of businesses who trade shortly before or nearly right at market close with both buys and sells  There are lots of theories as to how the market behaves at various times of day, days of the week, months of the year.  There are some few patterns that can emerge but in general they don't provide a lot of 'lift' above pure random chance, enough so that if you 'bet' on one of these your chances of being wrong are only very slightly different from being right, enough so that it's not really fair to call any of them a 'sure thing'.  And since these events are often fairly widely spaced, it's difficult to play them often enough to get the 'law of large numbers' on your side (as opposed to say card-counting at a blackjack table) which basically makes betting on them not much different from gambling I consider speculation to be a security purchase where the point is to sell it to someone for a higher price.  Day-trading is completely speculative. I consider Investment to be a purchase you make for its underlying value. You are buying it at that price because you believe the present value of the future payments is higher than the price you are paying. I may sell an investment if a higher price is offered than I think it's worth, or if the business situation changes, but I don't plan on it.   Hedging is a third type of security purchase, where you are decreasing your overall risk.  If you are a hog farmer, selling hog futures on the CME is hedging, because it locks in the amount you get per hog, regardless of what the price of hogs does. Commodities markets only have hedgers and speculators.  Investors don't make sense, it doesn't have an underlying value.