I don't think there is a single brokerage that hasn't used delays by day traders to manipulate the market in one way or another since the late 90's when it was a game changer with the internet. I know some are calling out Robinhood and others, but the market is a treacherous business to be in if your not a registered trader. Day trading isn't what it used to be.Yea but I was watching and it sailed right past my limit. Then I canceled that and placed a market order which was just ignored. I was just trying to score on a wave and their system screwed me out of a nice gain. It finally executed the market order but I was pissed! I've never had a market order not post within a few seconds and the same goes for a limit or trailing stop. They've always been within cents of my price. I'm pretty sure they were pulling some Robinhood crap without disclosing it.