Hi all, I'm new to options and my question is about stockoptions that are thinly traded; the spread is often huge and when I buy from my (European) broker I get filled at the Ask. So basically my postion could be 30-40% down immediately... US based TastyWorks filled me at a mid price, which changes the whole game...! They claim that about 50% of the orders get filled at mid price. My European broker assured me they're not that generous So... is there a difference between brokers and how do professionals deal with this mysterious "mid price" which is not quoted or visible...??