Abstract: Methods, systems mediums and graphical user interfaces are provided for monitoring and trading of financial instruments. According to various embodiments, a graphical user interface (GUI) trading widget for electronic trading of financial instruments is provided which floats translucently over the surface of a price chart dynamically displaying market action. The trading widget enables a trader to specify parameters of an order (e.g., buy, sell, quantity, price, limits, etc.), and enter the order into an electronic exchange. The trading widget can positioned on the chart where the trading widget is most convenient for trade execution and least intrusive on the display of price or other market information.

Abstract: A method for trading a financial instrument includes displaying a dynamic price scale containing a plurality of prices corresponding to orders for a financial instrument dynamically shifting the prices in the price scale when the inside market changes, displaying a plurality of buy order entry cells aligned with prices in the dynamic price scale and a plurality of sell order entry cells aligned with prices in the dynamic price scale, displaying a static inside market window around prices associated with the inside market, wherein the static inside market window does not move in response to a change in the inside market, and enabling a user to enter a buy or sell order by selecting one of the plurality of buy order entry cells or one of the plurality of sell order entry cells.

Abstract: A method for analyzing financial data related to a financial instrument traded on an electronic exchange includes serially receiving sets of price and volume data including a price corresponding to a best bid, a best ask, or a trade, and a volume representing the volume of units of the financial instrument available at the best bid price or best ask price or executed at the trade price, and generating a data point including a best bid price, a best ask price, a high price, a low price, a bid trade volume, a bid large trade volume, an ask trade volume, and an ask large trade volume of the financial instrument in the discrete time period, and determining whether the inside market has moved based at least in part on a relationship between the most recently received price and one or more of the current best bid price, the current best ask price, the current high price, and the current low price.