I was wondering if anyone else uses IB and if they use MOC orders. I have gotten some bad fills and don't understand why if the order calls for MOC. Take today for instance: CVO- sold @ 24.68...Last price listed was 24.68...PERFECT! PRM- sold @ 2.91..Last price listed was 2.91........PERFECT! GME-sold @ 39.21...Last price listed was 39.25...off 4 cents..ok. PNK-sold @ 30.83...Last price listed was 30.83....PERFECT! ACH- sold @ 42.51..Last price listed was 43.05! WTF happened? CKP-sold @ 26.48...Last price listed was 26.48.....PERFECTO! Why did I get porked with ACH ? If you say it is due to the bid/ask price, or that its just a market makers doing, fine. But what does not make sense is why I can get 4 or 5 that are absolutely perfect every day and sometimes get 1 that just smells so bad. Can I tell IB that I want the closing price and are they obligated to give the closing price to me with a MOC order? Just wondering if anyone else has experienced the same. peace.