Can I place a stock limit order to buy above the current price? Can I place a stock limit order to sell below the current price?
You are better off just placing a market order if you want to buy or sell straight away and avoid the queues. A market order will guarantee the purchase or sale of your shares, but it won't guarantee the price. I have done this, and the reason is to make sure that I don't run out of money in my account to place the order if there is an unexpected upswing in price. Suppose I have $1000 in my account and I want to buy 10 shares of ABCD that are currently at $99.  If the price doesn't change, then I am all set, but if the price goes up to $101 then I don't have sufficient funds to make the purchase. By placing a limit order at $100 I can ensure that I have enough money to place the order. In general, it is a rather unlikely scenario that it could happen, but placing the limit order is easy to do and it gives me peace of mind. I don't know what you mean about bypassing the queue. buy above the current price in the stock market You can do that, but what is the purpose to do so ? Brokers take the limit price of your order as the highest price you are going to pay. So if an order can be fulfilled below the limit they will do so.  can I sell below the current price  You can put in a order to do so. But what I have seen with my current broker is that the order never reached the market and wasn't executed at all. The broker might have some safeguards or process in place to stop me from doing so. Not sure how other brokers deal with it. "You can place the orders like you suggested.  This would be useful in a market that is moving quickly where you want to be reasonably sure of execution but don't want the full exposure of a market order.  This won't jump your spot in the queue though in the sense that you won't get ahead of other orders that are ""ready"" for execution just because you have crossed the spread aggressively."
From your question, I am guessing that you are intending to have stoploss buy order. is the stoploss order is also a buy order ?  As you also said, you seems to limit your losses, I am again guessing that you have short position of the stock, to which you are intending to place a buy limit order and buy stoploss order (stoploss helps when when the price tanks). And also I sense that you intend to place buy limit order at the price below the market price. is that the situation?  If you place two independent orders (one limit buy and one stoploss buy). Please remember that there will be situation where two orders also get executed due to market movements. Add more details to the questions. it helps to understand the situation and others can provide a strategic solution. That is a loaded question but I'll give it a shot.  First things first you need to determine if you are ready to invest in stocks.  If you have a lot of high interest debt you would be much better served paying that off before investing in stocks.  Stocks return around 8%-10% in the long run, so you'd be better off paying off any debt you have that is higher than 8%-10%. Most people get their start investing in stocks through mutual funds in their 401k or a Roth IRA.  If you want to invest in individual stocks instead of mutual funds then you will need to do a lot of reading and learning. You will need a brokerage account or if you have a stock in mind they might have a dividend reinvestment plan (DRIP) that you could invest in directly with the company. You will have to compare the different brokerage firms to determine which is best for you.  Since you seem to be internet savvy, I suggest you use a discount brokerage that let's you buy stocks online with cheaper commissions.  A good rule of thumb is to keep commissions below 1% of the amount invested. Once you have your online brokerage account open with money in there the process of actually buying the stock is fairly straightforward.  Just place an order for the amount of shares you want.  That order can be a market order which means the purchase will occur at the current market price.  Or you can use a limit order where you control at what price your purchase will occur. There are lots of good books out there for beginners.  Personally I learned from the Motley Fool. And last but not least is to have fun with it.  Learn as much as you can and welcome to the club. I assume you're talking about a sell order, not a buy order. When you place a limit sell order, your order is guaranteed to be placed at that price or higher.  If the market is currently trading much higher than the price of your sell order, then your mistakenly low limit order will be essentially a market order, and will be filled at  the current bid price. So the only way this is a problem is if you want to place a limit sell that is much higher than the current market, but mistakenly place a limit lower than the current market. "You said your strategy was to put it into a index fund.  But then you asked about setting  stock limits.   I'm confused. Funds usually trade at their price at the end of the day, so you shouldn't try to time this at all. Just place your order. If you are buying ETFs, there is going to be so much volume on the market that your small trade is going to have no impact on the price. You should just place a market order. A market order is an order to buy or   sell a stock at the current market   price. A limit order is an order to buy or   sell a security at a specific price. In the US, when you place a trade with any broker, you can either place a limit order or a market order.  A market order just fills your order with the next best sellers in line.  If you place an order for 100 shares, the sellers willing to sell 100 shares at the lowest price will be matched with your order (sometimes you may get 50 shares at one price and 50 shares at a slightly different price).    If your stock has a lot of volatility and you place a market order for a small amount of shares,  you will get the best price. If you place a limit order, you specify the price at which you want to buy shares.  Your order will then only be filled with sellers willing to sell at that price or lower (i.e. they must be at least as good as you specified).  This means you could place an order at a limit that does not get filled (the stock could move in a direction away from your limit price).  If you really want to own the stock, you shouldn't use a limit order.  You shouldn't only use a limit order if you want to tell your broker ""I will only buy this stock at this price or better.""  p.s. Every day that passes is NOT a waste.  It's just a day that you've decided investing in cash is safer than investing in the market." "You can interpret prices in any way you wish, but the commonly quoted ""price"" is the last price traded. If your broker routes those orders, unlikely because they will be considered ""unfair"" and will probably be busted by the exchange, the only way to drive the price to the heights & lows in your example is to have an overwhelming amount of quantity relative to the order book. Your orders will hit the opposing limit orders until your quantity is exhausted, starting from the best price to the worst price. This is the functional equivalent to a market order." If you find a particular stock to be overvalued at $200 for example and a reasonable value at $175, you can place a limit order at the price you want to pay. If/when the stock price falls to your desired purchase price, the transaction takes place. Your broker can explain how long a limit order can stay open. This method allows you to take advantage of flash crashes when some savvy stock trader decides to game the market. This tactic works better with more volatile or low-volume stocks. If it works for an S&P500 tracking ETF, you have bigger problems. :) Another tactic is to put money into your brokerage cash account on a regular basis and buy those expensive stocks & funds when you have accumulated enough money to do so. This money won't earn you any interest while it sits in the cash account, but it's there, ready to be deployed at a moment's notice when you have enough to purchase those expensive assets. The Limit Order are matched based on amount and time. The orders are listed Highest to Lowest on the Buy Side. The orders are listed Lowest to Highest on the Sell Side. If there are 2 Sell orders for same amount the order which is first in time [fractions of milliseconds] is first.  The about is the example as to how the orders would look like on any exchange.  Now the highest price the buyer is ready to pay is 20.21 and the lowest price a seller is ready to sell for is 20.25. Hence there is no trade. Now if a new Buy order comes in at 20.25, it matches with the sell and the deal is made. If a new Buy order comes in at 20.30, it still matches at 20.25. Similarly if a Sell order come in at 20.21, it matches and a deal is made. If a Sell order come in at 20.11, it still matches 20.21.   Incase of market order, with the above example if there is a Buy order, it would match with the lowest sell order at 20.25, if there is not enough quantity , it would match the remaining quantity to the next highest at 20.31 and continue down. Similarly if there is a Sell market order, the it would match to the maximum a seller is ready to buy, ie 20.21, if there is not sufficient buy quantity at 20.21, it will match with next for 20.19   If say there are new buy order at 20.22 and sell orders at 20.24, these will sit first the the above queue to be matched. In your above example the Lowest Sell order was at 20.10 at time t1 and hence any buy order after time t1 for amount 20.10 or greater would match to this and the price would be 20.10. However if the Buy order was first ie at t1 there was a buy order for 20.21 and then at time later than t1, there is a sell order for say 20.10 [amount less than or equal to 20.21] it would match for 20.21. Essentially the market looks at who was the first to sell at lower price or who was the first to buy at higher price and then decide the trade.  Edit [To Clarify xyz]: Say if there is an Sell order at $10 Qty 100. There is a buyer who is willing to pay Max $20 and is looking for Qty 500. Your key assumption that the Buyer does not know the current SELL price of $10 is incorrect. Now there are multiple things, the Buyer knows the lowest Sell order is at $10, he can put a matching Buy order at $10 Qty 100, and say $11 Qty 100 etc. This is painful. Second, lets say he puts a Buy order at $10 Qty 100, by the time the order hits the system someone else has put the trade at $10 and his order is fulfilled. So this buyer has to keep looking at booking and keep making adjustments, if its a large order, it would be extremely difficult and frustrating for this Buyer. Hence the logic of giving preference. The later Buy order says ... The Max I can pay is $20, match eveything at the current price and get the required shares. Because in the case for 100/101, if you wanted to placed a limit buy order at top of the bid list you would place it at 101 and get filled straight away. If placing a limit buy order at the top of 91 (for 90/98) you would not get filled but just be placed at the top of the list. You might get filled at a lower price if an ask comes in matching your bid, however you might never get filled. In regards to market orders, with the 100/101 being more liquid, if your market order is larger than the orders at 101, then the remainder of your order should still get filled at only a slightly higher price. In regards to market orders with the 90/98, being less liquid, it is likely that only part of your order gets filled, and any remained either doesn't get filled or gets filled at a much higher price.