Bid is a buyer's price

By this it is ascertained when to sell the stock

The rate the buyer sells the bid stock is

Bid stock is a sort of price for the buyer

Buyer sends own stock only when there is an issue call price

Seller is ready to sell the stock himself under the asking price

The bid demand spread is used as an indicator of the liquidity of the stock.

The stock depends on the difference between the bid price and the demand price.