Still learning options to a good degree but wanted to know about the Qs and if something I've experienced a few times is normal. (Preferably for someone who deals with options on QQQQ) Details are options on the Qs, end of day volume was around 6000 - 7000 and the contract size was around 20 - 30 each time. I'd placed a limit order to sell at around 11am at the ask price. I fully expected it to take some time to go through but a few times now I couldn't get a fill by the end of the day except once. Is this normal? Any recommendations or thoughts as to why? Thank you.