buy sell stocks' when a stock rises how do you know you can sell?

Question

it to make a profit , is it mandatory for the stock exchange to buy it from you or do you have to wait for a buyer who is willing to take it at the high price, to buy it at that price??

Answer 1

For every buyer there is a seller, and vice versa. If you put a market order to sell in, your stock will be sold at the prevailing market price. This price could fluctuate quite a bit, depending on the demand for the stock. So if the stock is rising, your sell price could be a bit higher than at the instant you put your sell order in. On the other hand, if bad news is out, your market order may execute quite a bit lower.

If you put in a sell limit order, then what you're saying is that you want to sell, but you want at least the limit price when you sell. If you think the stock will rise a little further, and your limit order executes, you'll get a little higher price for your stock.

The risk of sell limit orders is if you want to sell and the stock gaps below your limit sell price, your order will not get executed.
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Answer 2

The stock exchange does not buy it. If your broker does not find an immediate buyer, the brokerage firm will buy it from you at the prevailing market price. It is almost guaranteed that you will find a buyer, however.

Answer 3

you can always sell at the going price.
no one "knows" when; they guess.
some guess better than others.
get informed and....
when it's bad, buy.
when it's good, sell.

Answer 4

we can predit it by using some technical analysis and time series for forcasting............