- hodinovka:
            value_template:
              "{# Define your intervals here as tuples (hour starting the interval, hour ending the interval (excluded)) #}
              {% set intervals = [
              (1, 8),
              (8, 16),
              (16, 24),
              ] %}

              {# We need to use namespace so we can write into it in inner cycle #}
              {% set min = namespace(price=None, dt=None, cheapest_hours=[]) %}
              {% set cheapest_hours = [] %}


              {% for interval in intervals %}
              {# Reset min price from previous runs #}
              {% set min.price = None %}

              {# Go through all the hours in the interval (end excluded) and find the hour with lowest price #}
              {% for i in range(interval[0], interval[1]) %}
              {# Get datetime of current hour in current interval #}
              {% set hour_dt = now().replace(hour=i, minute=0, second=0, microsecond=0) %}

              {# Get value for that hour #}
              {% set value = states.sensor.current_spot_electricity_hour_order.attributes.get(hour_dt.isoformat()) %}

              {# Skip if not found #}
              {% if value is not defined %}
              {% break %}
              {% endif %}

              {# value is tuple (order, price), we'll use the price #}
              {% set price = value[1] %}

              {# Min price is not set or is higher than price of current hour => store the min price and hour #}
              {% if min.price is none or price < min.price %}
              {% set min.price = price %}
              {% set min.dt = hour_dt %}
              {% endif %}
              {% endfor %}

              {# Store cheapest hour in current interval #}
              {% set min.cheapest_hours = min.cheapest_hours + [min.dt.hour] %}
              {% endfor %}

              {# use this to get the cheapest hours #}
              {# {{ min.cheapest_hours }} #}

              {# return True if current hour is in the cheapest hour of any interval #}
              {{ now().hour in min.cheapest_hours }}"