It depends on the liquidity of the stock. Most stocks listed on the main exchanges are very liquid. If you are talking about small amounts, for example $20,000 then there should be no problem buying or selling. If you look at Level2 prices it will show the number of shares at the bid and offer and the depth of the order book. If you have 20,000 shares to sell at $2 and there are 20,000 or more shares bid on the order book at $2 then as soon as you input your order it will automatically trade

In most stocks - other than those that are "thinly traded" your market order to SELL at current market price will be executed within two or three seconds. On the other hand, if you introduce your sell order as a "limit order" then you could sell in seconds, minutes, hours or never. A "limit order" is where you specify the minimum price you will accept to sell your shares. The closer to the "bid" price your limit order is - the more likely it is to be executed quickly. If the current "bid" price is $45.50/share and the current "ask" price is $45.60 then a limit order by you of $45.55/share is likely to be executed. Not immediately - unless you only ask for $45.50/share.

To buy or sell stocks, you will need to open an account with a stock broker. The brokers are the ones that make the actual trades.

When you place an order to buy or to sell, the trade usually takes place within a couple of seconds. If your stock is rare or otherwise has very low trading volume, the trade could take much longer.

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obviously you need to do a bit of homework, bro

there are limit orders, stop orders, and you can also place a market order

you do not have to be at your computer to wait for the stock price to reach a certain point, bro

Please read up on the terms in wiki, bro

The transaction will complete when the market hits your asking price.

If you set your asking very high and the market price never hits it then your transaction will never happen.

You need to know the terms 'put' and 'stop.'

I'm starting to read more about stocks to hopefully invest one day. While reading I came across the concept that there is a seller and buyer of the stock shares. If I create an online account on any of the many website that allow users to sell/buy stock, buy a stock of interest, wait until price goes up and decide to sell. Now if I set the ask price to the current value of the stock, do I wait for minutes, hours, or even days for an interested buyer to purchase my shares or the company I bought the stocks from purchases my shares immediately?

I would greatly appreciate your clarification!