How to deal with intraday prices conflicting with EOD highs and lows
"In the US, stocks are listed on one exchange but can be traded on multiple venues.  You need to confirm exactly what your data is showing: a) trades on the primary-listed exchange; or b) trades made at any venue. Also, the trade condition codes are important.  Only certain trade condition codes contribute towards the day's open/high/low/close and some others only contribute towards the volume data.  The Consolidated Tape Association is very clear on which trades should contribute towards each value - but some vendors have their own interpretation (or just simply an erroneous interpretation of the specifications). It may surprise you to find that the majority of trading volume for many stocks is not on their primary-listed exchange.  For example, on 2 Mar 2015, NASDAQ:AAPL traded a total volume across all venues was 48096663 shares but trading on NASDAQ itself was 12050277 shares. Trades can be cancelled.  Some data vendors do not modify their data to reflect these busted trades.   Some data vendors also ""snapshot"" their feed at a particular point in time of the data.  Some exchanges can provide data (mainly corrections) 4-5 hours after the closing bell.  By snapshotting the data too early and throwing away any subsequent data is a typical cause of data discrepancies.   Some data vendors also round prices/volumes - but stocks don't just trade to two decimal places. So you may well be comparing two different sets of trades (with their own specific inclusion rules) against the same stock.  You need to confirm with your data sources exactly how they do things. Disclosure: Premium Data is an end-of-day daily data vendor."
"Each candlestick in a candlestick chart represents the open, close, high and low for a period of time. If you are looking at a daily chart it represents the open price, close price, high price and low price for that day. If you are looking at an hourly chart, then a single candlestick represents the open, close, high and low prices for an hour. If looking at a weekly chart, then a single candlestick will represent the opening price on Monday morning, the closing price on Friday afternoon, and the highest and lowest price for that week. The diagram below represents the two main types of candle sticks.  When the price closes higher than they open for the period of the candlestick it is called a bullish candle and the main body is usually represented in green. When the price closes lower than they open for the period of the candlestick it is called a bearish candle and the main body is usually represented in red. In a bullish candle with a large real body and small shadows or wicks, where prices open near the low of the period and close near the top of the period, it represents a very bullish period (especially if volume is high). An example of this situation could be when good news is released to the market and most market participants want to buy the shares driving prices higher during the period. An example of a bullish candle with a small real body and a large upper shadow or wick could be when market participants start buying early during the period, then some negative news comes out or prices reach a major resistance level, then prices drop from their highs but still close higher than the open. The large upper shadow represents some indecision in prices moving higher. In a bearish candle with a large real body and small shadows or wicks, where prices open near the high of the period and close near the low of the period, it represents a very bearish period (especially if volume is high). An example of this situation could be when bad news is released to the market and most market participants want to sell the shares driving prices lower during the period. An example of a bearish candle with a small real body and a large lower shadow or wick could be when market participants start selling early during the period, then some positive news comes out or prices reach a major support level, then prices move up from their lows but still close lower than the open. The large lower shadow represents some indecision in prices moving lower. These are just some examples of what can be derived from looking at candlestick charts. There are plenty more and too much to include in this answer.  Another type of candle is the Doji, represented in the diagram below.  The Doji Candle represents indecision in the market. Prices open then move up to the high of the period then start falling past the open before reversing again and closing either at the open or very close to the open. The market participants can't decide whether the price should move up or down, so prices end up closing very close to where they opened. A doji Candle close to a market high or low could represent a turning point in the short term trend and could mean that over the next period or two prices could reverse and go in the opposite direction. There are many more definitions for candlestick charts, and I would recommend an introductory book on candlestick charting, like one from the ""Dummies"" series. The main things to keep in mind as a beginner it that a strong bullish candle with small shadows and large real body could represent further price movement upwards, a strong bearish candle with small shadows and large real body could represent further movement downwards, and any candle with large shadows could represent indecision and a reversal from the direction of the large shadow." "Why would people sell below the current price, and not within the range of the bid/ask? There are many scenarios where this is deliberate but all of them boil down to the fact that the top level's bid doesn't support the quantity you're trying to sell (or is otherwise bogus[1]). One scenario as an example: You're day-trading both sides but at the end of the day you accumulated a rather substantial long position in a stock.  You don't want to (or aren't allowed to[2]) be exposed overnight, however.  What do you do? You place an order that is highly likely to go through altogether.  There's several ways to achieve that but a very simple one is to look at the minimum bid level for which the bid side is willing to take all of your shares, then place a limit order for the total quantity at that price.  If your position doesn't fit into the top level bid that price will well be lower than the ""current"" bid. Footnotes: [1] Keyword: quote stuffing [2] Keyword: overnight margin (aka positional margin, as opposed to intraday margin), this is highly broker dependent, exchanges don't usually distinguish between intraday and overnight margins, instead they use the collective term maintenance margin" Make the price match the cheapest similar product, then advertise the hell out of it. If it's in a specialist section, put some in the general area too. Keep it towards the fish kits so that when people are buying a bunch of stuff for a new tank, they can get cheaper food. If the price/lb is right, most people will feed their fish anything. You can also extend the life of your overstock by keeping it in cool storage. Maybe a basement with an AC. Shy away from 'buy more than one to save' deals, those are just annoying. Just post the price along with some indication that it's a 'low price'.   For pricing, figure out how much you paid for the lot to find your ideal minimum return, then multiply it by 50-80% depending on your maximum loss. Divide each of these numbers by the number of units to get the ideal price for your situation. Don't forget to fuzz it upwards to account for storage costs and other minor overhead. Repeat for each product. If a shop offers 0% interest for purchase, someone is paying for it. e.g., If you buy a $X item at 0% interest for 12 months, you should be able to negotiate a lower cash price for that purchase. If the store is paying 3% to the lender, then techincally, you should be able to bring the price down by at least 2% to 3% if you pay cash upfront. I'm not sure how it works in other countries or other purchases, but I negotiated my car purchase for the dealer's low interest rate deal, and then re-negotiated with my preapproved loan. Saved a good chunk on that final price! Do not use a stop loss order as a long-term investor.  The arguments in favor of stop losses being presented by a few users here rely on a faulty premise, namely, that there is some kind of formula that will let you set your stop such that it won't trigger on day-to-day fluctuations but will trigger in time to protect you from a significant loss in a serious market downturn.  No such formula exists.  No matter where you set your stop, it is as likely to dump you from your investment just before it begins climbing again as it is to shield you from continued losses.  Each time that happens, you will have sold low and bought high, incurring trading fees into the bargain.  It is very unlikely that the losses you avoid in a bear market (remember, you still incur the loss up until your stop is hit; it's only the losses after that that you avoid) will make up the costs of false alarms. On top of that, once you have stopped out of your first investment choice, then what?  Will you reinvest in some other stock or fund?  If those investments didn't look good to you when you first set up your asset allocation, then why should they look any better now, just because your primary investment has dropped by some arbitrary[*] amount?  Will you park the money in cash while you wait for prices to bottom out?  The market bottom is only apparent in retrospect.  There is no formula for calling it in real time. Perhaps stop loss orders have their uses in active trading strategies, or maybe they're just chrome that trading platforms use to attract customers.  Either way, using them on long-term investments will just cost you money in the long run.  Forget the fancy order types, and manage your risk through your asset allocation.  The overwhelming likelihood is that you will get better performance, and you will spend less time worrying about your investments to boot. [*] Why are the stop levels recommended by the formulae invariably multiples of 5%?  Do the market gods have a thing for round numbers? There are also currency hedged ETFs. These operate similarly to what gengren mentioned. For example, a currency hedged Japan equities ETF has an inherent short yen/usd position on it in addition to the equity position, so the effects of a falling yen are negated. Note that it will still be denominated in dollars, however. AED is pegged to the dollar though, isnt it? If your broker is charging you a crazy price maybe try again a different day, or get a new broker. http://www.ishares.com/us/strategies/hedge-currency-impact Many of the Bitcoin exchanges mimic stock exchanges, though they're much more rudimentary offering only simple buy/sell/cancel orders.  It's fairly normal for retail stock brokerage accounts to allow other sorts of more complex orders, where once a certain criteria is met, (the price falls below some $ threshold, or has a movement greater than some %) then your order is executed.  The space between the current buy order and the current sell order is the bid/ask spread, it's not really about timing.  Person X will buy at $100, person Y will sell at $102.  If both had a price set at $101, they would just transact.  Both parties think they can do a little bit better than the current offer.  The width of the bid/ask spread is not universal by any means.  The current highest buy order and the current lowest sell order, are both the current price.  The current quoted market price is generally the price of the last transaction, whether it's buy or sell. "This is called a Contingent Order and is set up so if one order is filled (in this case) the other order is cancelled.  It's a common desire that one would wish to have a stop-loss in place but also a targeted sell price for their in-the-money sell point.  Your broker will tell you all you need to know about how to enter this, if you explain you'd like to place a contingent order. (As Victor noted below, your specific order would be a ""One Cancels Other"" or ""OCO"") Great first question, welcome to Money,SE."