How to plot same study for several symbols in the lower region ?

[Gnanoo]

Hi
I need some help to apply the same study to several symbols in the lower region.
It can be simple one for this example - if the 8 EMA above the 21 EMA then plot a green dot, otherwise plot red dot.

I can only display the first symbol, the rest do not appear.
How can this be done?

https://ibb.co/qp9V6G9Photo

 

[tomsk]

Seems quite straightforward, all you got to do is to plot each symbol at a different level and then color the dots according to your rules.
Post your code attempt and someone will point out any areas that need to be reworked