the bots are placing and removing multiple hundred lots at all times,so if you had the order sitting there for 30 minutes or more,you might get filled,sometimes if i want to buy 27 and its 27-.27.25 and you are going to pay 27.25 anyway,you can go in with a mrkt order and get the 27 because the mrkt order moves ahead of the bid,rare though,it has to be when someones hitting the bidQuote from ddog:
If I put in a limit order to buy ES at 1227.00 limit, would I only get filled if the bid is 1226.75 and the ask is 1227.00 or could I get filled if the bid is 1227.00 and the ask is 1227.25? (Small order).