Software: GT247 Trader (MetaQuotes) version 5.00 build 2078 (11 June 2019)
When you have autotrade markers or lines or other annotations on a graph, then drag a new share on to the graph, the markers remain.
In my case I have a common window that I drag my trades to, and after a while it gets really cluttered with all the markers for other shares that aren't related to the current view. I have to load my template again into the window to clear them off.
Attached is a simple example, but it gets really cluttered over time!