The image you posted looks like the Rating Column has something like:
%play_count% || %_dynamic_rating%
If playcount = 0, then DAR Rating will output "-----".
Did you do the bit where he states:
"Now, click on the Scripts tag, and paste the following into the textfield on the “Display” tab."
https://resir014.github.io/etc/fb2k/
To get the "indexed" rating dots (rather than a number) you need to enter the following code into Columns > Scripts (Tab) > Display (Tab)
$puts(maxdar,10000)
$puts(mindar,5000)
$puts(maxsub,$sub($get(maxdar),0))
$puts(r3,$ifgreater(%_dynamic_rating%,$get(maxsub),$get(maxsub),%_dynamic_rating%))
$puts(r4,$ifgreater($get(r3),0,$get(r3),1))
$puts(minmax,$sub($get(maxdar),$get(mindar)))
$puts(darind1,$sub($get(r4),$get(mindar)))
$puts(darind2,$div($mul($get(darind1),10),$get(minmax)))
$puts(darind3,$ifgreater($get(darind2),1,$get(darind2),1))
$puts(display,$rgb(100,100,100)$repeat($char(9679),$get(darind3))$rgb(220,220,220)$repeat($char(9679),$sub(10,$get(darind3))))
$puts(notplayed,$rgb(200,200,200)- n/a -)
$ifgreater(%_dynamic_rating%,0,$get(display),$get(notplayed))
The official guide for DAR setup is here:
http://www.giantpygmy.net/gpa/data/uploads/files/dada_autorating_dar_latest_version.txt
And the HA thread for DAR is here:
https://hydrogenaud.io/index.php/topic,83954.0.html
C.