I'm sure the more knowledgeable traders here can correct me but, when channel flippers get filled on the bid they usually throw them right on the ask with a GTC order. They just want to get inline and flip their shares. They are usually very disciplined about this routine and are not really concerned about the stock "running". In this case they take the 100% from 1 to 2 and are good with that. If a sell order is a GTC, doesn't it stay on L2 even after the market closes?