is it bad to limit buy a share
Using a limit order allows an investor to buy at a specified price. Say you want to buy 100 shares of Apple at 400 a share, but it's trading at 420. You can enter a limit order to buy at 400. If the stock dips to 400 or below, your order will be filled at the best available price. The disadvantage with limit orders is that the stock may never dip down to your price, instead only moving higher.