In stock trading ask prices can exist at several price levels above the market price, which is where the current price of the stock is. When people say ‘ask,’ they usually mean the lowest ask price.
Do I get filled when I put out a sell order at the market price?
Not necessarily, the market price is the price of the last transaction that occurred. When you place a sell order at the market price, you need to wait until someone is willing to buy them at that price.
What happens if I sell at the bid?
The bid is the price someone is willing to buy shares. If you sell at the bid, you will get immediately filled (if someone is not faster than you) as long as there are enough people that want to buy the number of shares you wish to sell. If you can’t sell all your shares at that price, your order will get partially filled, and you need to wait until someone is willing to buy more at that price.