Add product for easy sorting
Move set_value
Set value on creation of object
Rename to get_values
Add total_tick_periods
Use total_tick_periods
Remove self
Add delta
Prepare for recalculating if there is too few periods
Increase number of periods
Add determine_vert_params
Use ScaleAdvisor
Rebuild determine_vert_params
Check for too many periods requested
Add err_message
Use err_message