The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ActionListener ...

Patterns summarize discovered design solutions that make people most comfortable in experiencing and using built form. Their relative merit is that they were decided on a firm (in many cases ...

One of our biggest challenges as software developers is organizing our code so that it is easier to extend and maintain. The Command pattern helps us do that by encapsulating all the data required to ...

One of the most reliable, recurring market patterns is the concept that sharp impulse moves followed by a quiet period usually lead to another move in the same direction. An impulse move is simply a ...

Gordon Scott has been an active investor and technical analyst or 20+ years. He is a Chartered Market Technician (CMT). The island reversal pattern is a key indicator on stock charts, showing groups ...