thanks pasha. i have search help file of emkay's but it didin't help. thanks for information .
you should get a book and read, you could download books from 4shared com . if you just go to the site and type stocks that should list some good books.
investopedia dot com : you could get all definitions
if a stock has traded last at Rs. 100
Limit Order : if you think it could go down Rs 3 before going up then you can put a limit order to buy at Rs 97(it means buy only if the price comes to 97 YOU DON'T WANT TO PAY more than that).
Stop Loss: you already bought the stock at 100 and it goes to 120, you want to sell off automatically if the price goes down to 115, so you place a stop loss order at 115, your STOCKS WILL BE SOLD ONLY IF PRICE DROPS BELOW YOUR POINT, otherwise the order will not execute.
Market Order: buy with no conditions attached about, what price you want to buy. so it will buy at sellers asking price.
thanks