The "best" order type for buying stock depends on whether you prioritize (immediate execution) or price control (paying exactly what you want).
Market Order Vs. Limit Order And When To Use Them - Bankrate what order type to buy stock
: Best for price protection. You set a maximum price you are willing to pay; the order only executes if the stock hits that price or lower. Comparison of Primary Order Types The "best" order type for buying stock depends
: Best for immediate execution. You buy the stock right away at the current "ask" price, regardless of what that price is. regardless of what that price is.