With Release 1.3.1 two new options "target_line" and "target_linecolor" have beeen added. "target_line" lets you display a line for a given value within coordinate system in addition to the grid of your chart. "target_linecolor" sets the color for this target line. If you omit this parameter, "target_linecolor" defaults to "grid_color".
Release 1.3.0 is an updated version of release 1.2.2 but with completely restructured code basis. Release 1.2.2 was mainly a "Security-Release" - e.g. in all php-scripts will be checked, wether the Joomla Framework is used. This means that direct calls not using Joomla's framework will fail with an error.
With release 1.2.2 the interface to modal windows had been extended. With parameter "modal_chart", you may now request a chart to be created and displayed in a modal window. This function has been implemented with the bootstrap framework for modal windows.
The OFC Post/Get interface is no longer (for security reasons and limited functionality) supported. In addition exception-handling for database interfaces (MYSQL) has been recoded to support Joomla Version 3.x API.
Release 1.3.0 also has improved the interfaces to build web-application which need to include charts in their content delivery. Please read more in my article about web applications using flashchart's interfaces.