Once you have chosen your broker and are setup in their platform, you will find your stocks and purchase them through the platform.
To buy or sell a stock, you have to complete some information:
Market: Which market the symbol trades on.
Symbol: The symbol of the company you want to buy or sell.
Volume: The number of shares you want to buy or sell.
Market or Limit price: Act at the current market price or set a limit price.
Duration: For limit, how long should the order stay open until filled. Learn about them here.
Action: Buy (Bid) or sell (Ask). This is why you buy at asking price, or sell at bidding price. You are taking a “bid”, or fulfilling an “ask”.
Place The Order