Please help me fix the Chikou Span!!!

[phanlinh_111]

Dear Seniors,
I'm a new amibroker user.
I see that the Chikou Span in the Ichimoku chart has a short horizontal line at the end, like this:

I mean a black round.
I can't find out how to remove the horizontal line, please help me!
Thanks in advance!
Best regards,

 

[boufalo]

go to tools/preferences it is somewhere there