Adding an IM system to Amazing Charts would be thousands of lines of code and the implementation would be non-trivial. This may seem like a simple request, but it's far from it. To be honest, I see this as one of those things AC may never get to since there are third party solutions available that can do the same thing - especially considering:
* MU 2 around the corner (some are already asking about it on the forum)
* Integration with their new PM partner
* Integration with other PM's they promised
* Fixing the disaster that is 6.6.1.
Apologies, but when it comes to software development I call it like I see it. If I were steering the ship at AC, then with everything going on spending 6 months adding an IM system would not even be on my radar.
JamesNT