For me there is no better indicator for trading than previous trades. Trades literally define the leading edge of the trend. By watching a scrolling summary of trades I am able to determine whether demand is slowing down or picking up for the stock. The volume of each trade helps me to determine if there are any serious buyers in the market and how badly they want to buy the stock. You can get a real feel for the market of a stock by watching the velocity of the trades. As momentum gains the speed of trades intensifies. Whether or not the price can break through on this higher volume is a key in determining support or resistance points. Knowing these support and resistance levels is a key to knowing when to enter or exit trades. Often traders or marketmakers can fool you by jocking around on the bid/ask, but previous trades denote the true sentiment of the market.