There’s some disagreement among day traders regarding whether market orders should be used or not. On the one hand it’s possible to get filled at a horrible price when using the market order, but others argue that with spreads that are often a penny or less, and so much liquidity in most stocks, using limit orders no longer makes sense. Not using a market order could lead to missing out on a good trade in a fast-moving market is the argument used in this case. Ultimately the decision is yours to make, just be sure you understand the risks and rewards that go with using market orders.