How to extract ADS marker information to matlab?
I think you can use list instead of graph and copy-paste the list data in MATLAB and then select anything that you want inside MATLAB and plot the data in MATLAB 

OR

Export the data display plot or list to a tab-delimited ASCII file:


Select one or more plots or lists. 
Choose File > Export > Write selected item to tab-delimited ASCII. The Write Data To ASCII File window appears. 
Enter a filename then click OK. A file suffix of .txt is automatically appended to the selected file name. 


You can then read and plot the data in MATLAB and use Matlab markers.

See this link for more.