I have been trading NYSE stocks now for 2-3 months after trading nasdaq stocks for awhile. Today I just realized something new which probably seems rather obvious to the more experienced NYSE traders out there but a simple of explanation would help me a lot. I am surprised I have done as well as I have and not known this. Anyway my question is on spotting market orders, especially short orders, on NYSE stocks. I guess I always assumed it was the same as for nasdaq stocks but then remembered the short rules are completely different (kind of forget when you use bullets). I know for nasdaq it would be easy to spot say a market INCA order because he would follow the price down always a penny above the inside bid and same thing for buy market orders on the way up. However NYSE market orders trade completely different and partly I am assuming is because of the differences in the short rule. So some of my questions are: How do you spot a short market order on NYSE? What are you looking for in the prints and with the spread/NYSE quote to confirm this is a market order and not just a size limit offer? What about how buy market orders look like with the way the size is moved up and how the spread/quotes are reflected for the move up? Can these types of orders be seen in large cap higher volume or high volume news stocks or do they mostly apply to lower volume NYSE stocks? Let say by high volume I mean 4 million shares a day or more. If they can't be applied to higher volume stocks then what are some of the things you look for to spot short sellers/sellers in the stock?