TF keeps content in memory, on each bar it grows a little bit. So if it you have a chart long time it will eat RAM for sure. To that add that tick replay consumes lots of resources. You need a powerful computer to handle those charts specially if you are operating in 3 markets at the same time. There are little choices there. In latest versions I reduced memory consumption and increased rendering speed. I doubt we have some memory leak since C# is a language that suffers little from that. I could do more extensive checks however, they are still possible. I have plans to make a few optimizations to reduce created garbage in memory during every render and also to increase rendering speed. But unlikely I will be able to reduce memory consumption much. Is quite optimal already.