Quote from Bitstream:
its not difficult at all but can be very very risky; imagine how good your prospects are in case the stock u just bot into with 100k shares suffers a hault...or maybe if u are short and some1 decides to make a sudden, aggressive and unannounced takeover offer...stocks ripes trough your order and gets up 100%+, boy boy, how u gonna get out there with your 100k shorts and massive demand for the stock?
by the way all u have to do is to place huge size orders just 1c above the offer [if u sell] and 1c below the bid [if u buy] or u can lock the mkt with size on both sides, usually on low priced stocks goin' nowhere fast, like lu; u will get paid cuz u are not suckin' liquidity but addin' it since u are not at mkt ...once the stock gets to your b/e point or when [more rarely] it gets 1c in your favor, u just liquidate and collect the rebate + the eventual 1c profits.
never done it myslef but i think there's really not much more to it.