really drifter because etrade says you can and this person apparantly thinks you can too.
A market order is basically an order that you place to buy or sell a stock that gets you into the market at the supposedly current prevailing market price. With a market order, you really don’t have any control over what actual price you will be “filled” at. You may see the current price of a stock trading at $0.55 a share, so you decide to buy a couple hundred thousand shares, but then you end up getting filled at $0.61.