Use graphic with Helper

Hi there,

I created a helper to show me the own use of my solar energy in %.

{% set net = states('sensor.p1_meter_vermogen') | float %}
  {% set solar = states('sensor.solaredge_huidig_vermogen') | float %}
{% if (solar + net) > solar %}
  {{ 1 * 100 | round(0) }}
{% else %}
   {% if solar > (net * (-1)) %}
      {{ ((solar + net) / solar) * 100 | round(0) }}
    {% else %}
      {{ 0 | round(0) }}
    {% endif %}
 {% endif %}

I want to display the values in a statistic graph like this :

But when I try to add that statistic graph to my dashboard, I cannot select this helper.
I only can select this helper when I use this ‘Sensor’

What do I need to do to be able to show the values of this helpen in the graph shown as below (photoshopped image) :

Please advise

YES, I did it. Selected the wrong helper.