Add a module that extends the sale.order.line model and adds the currency_id field. Make sure to include the change in the form view as well. And also check how it works with the invoice you automatically generates. You should take care of that

Hi,

To complete the currency openerp use Public Price List but the Price List is configured with default by (EUR).

you can verify this in sale.order : cur = order.pricelist_id.currency_id.

you must configure the price list.so activate Sales Pricelists (and /or) Purchase Pricelists in Technical Settings for user.

in menu Sales-->Configuration-->Pricelists configure the Public Pricelist with HUF.

same for purchase.