Abstract: A computerized trading system for trading a tradable product at stock exchanges where a user can define a number of criteria to be met in order for the system to allow/indicate a trade order of a selected Symbol or allow/indicate a pair trade of two selected Symbols. A method to format a data stream providing a novel result used for the calculation of technical indicators and the derived criteria and/or used for visual presentation of price movements of the tradable product in the computerized trading system by determining the time to close a bar. Product data having product prices is received at different times by the computer system, and the computer system for each closed bar has corresponding bar data buffers with data representing time of close of bar and last received product price at close of bar.

Abstract: A computerized system with charting capability for development, backtesting and technical analysis of strategies based on criteria used for decision making. The system receives and saves data parameters at different times from external devices. The system uses a method to determine a Probability Indicator from a set of criteria, which may be used to fully map a strategy over time. The method may further be used to visually map a strategy as a graph, which may be regarded as a visual backtest of the strategy. Such graph may be drawn on a chart using the time line of the chart, for the user to compare with the on-chart technical indicators and technical analysis. The Probability Indicator may further be represented as a chart, representing a strategy as a chart, which may be used to perform traditional technical analysis on a strategy.

Abstract: A computerized trading system for trading a tradable product at stock exchanges having a user terminal connected to a data communication system being able to provide a graphical user interface (GUI) to the user terminal through which a user can define a number of criteria to be met in order for the system to allow/indicate a trade order of a selected Symbol or allow/indicate a pair trade of two selected Symbols. A method to format a data stream providing a novel result used for the calculation of technical indicators and the derived criteria and/or used for visual presentation of price movements of the tradable product in the computerized trading system by determining the time to close a bar. Product data having product prices is received at different times at the computer system, and the computer system for each closed bar holds corresponding bar data buffers with data representing time of close of bar and last received product price at close of bar.