In the pre-market. If the highest ask is 10 and I place a bid (limit order) at 10.01, am i going to get an instant fill or does someone have to adjust their order to 10.01 to fill me? ... also this would raise the price, by paying the ask, or above it slightly...why dont people do this, to help push the stock up past a major resistance or support level, but taking out all the orders at a certain level, that would prevent price from reaching their objective?