I was wondering if anyone could explain a few important aspects of the tape to me? For example, what is a cross order? how do i notice when there is a cross order happening, and what benefits or downfall does it have on a buyer/seller What are refresh orders exactly? I know it is when there are more prints than stocks being offered or bid from the quote. But from the bid/share size of a single quote or all the quotes that came before the print? How do i spot these? And what effect do they usually have on a trader, as well as how to capitalize on them. How do people "hide" their size? How do i notice when someone is perhaps hiding their size, what sort of conditions should i look for to spot these, and again, how you trades be done when there is a size being hided. Finally, what are double prints? Why are they so important, What do they tell us? How could we use them to our advantage? lastly, i was wondering if anyone could share some insights to their strategy for knowing when to get in and get out of a trade in general. what sort of things do they look out for, regarding bid/ask prices, bid/ask shares, openbook? *how long do you guys usually study a stock before you go in on a trade? Do you just look for the uptick and look for a reasonable ratio for bid/ask size for shorting? That's what I know so far, but i would love to hear more on what you guys keep track of and what you utilize as a tool in determining the right direction of trades, as well as the timing for your entry and exit. Let's hear them! Thanks in advance guys.