Specific discount per item in shopping cart base on price per product

[Veni.]

Hello prestashop world ,

I'm looking an option or module that can add discount on each item depends on their price when added in shopping cart.
For example (trying to make it easy to understand) :

Product  A price 50 euro
Product  B price 100 euro

In shopping cart now customer will see 2 products of his choice and will get a discount for product A 10%
and for product B 5% .  this calculated based on product price, the more expensive get lower discount and the less expensive get higher discount. Products will be random not specified.

Any idea ?

[Rissinko]

Hi no one has idea how to do this ?