The plugin allows you to apply price variations on all products globally, by applying the changes only on preset time frames.
To do that, go to YITH Plugins > Booking > Costs and define a new range to apply variations on the booking costs.
If both global and specific product rules apply to the booking, rules defined in the “Booking” product will be processed last.
This means that the price rule defined as first in the product applies to the price that has already been edited by global rules, and not to the original price. Like a domino, all following rules in the product are applied to the product price.