Adding negative price items

[neamtua]

I'm trying to add something to the cart with either negative pricing or negative quantity in order to generate global discounts by value (not by percentage).

I do not understand why cart total and subtotal just ignore that line as the value it sets is 0.

For instance -20 qty for 1 euro subtotal is 0. I tried the other way, 20 qty, -1 euro unit price subtotal is still 0. Am i doing something wrong?

[neamtua]

I figured it out minutes after posting this by looking at the calculators. To get an accurate calculation I need to use priceTotal instead of subtotal