Some time ago, all postings related to TAChart have been collected in a dedicated subforum. Currently, this forum is a child of "Graphics and Multimedia"/"Graphics". Therefore, it is not visible on the main forum screen. As a consequence, users wanting to ask questions on TAChart do not see that there is a dedicated forum and post in other forums, like "General" or "LCL", scattering the TAChart-related postings all over the Lazarus forums.
To enhance visibility of the TAChart forum I'd propose to move it one level higher to become a child of "Graphics and Multimedia" where it is visible in the main forum screen.