Hi,

Please refer to the code:

from odoo import models, fields, api

class AccountMoveLine(models.Model):

    _inherit = 'account.move.line'

    debit_usd = fields.Monetary(

        string="Debit (USD)",

        compute="_compute_usd_values",

        currency_field='currency_id',

        store=False,

    )

    credit_usd = fields.Monetary(

        string="Credit (USD)",

        compute="_compute_usd_values",

        currency_field='currency_id',

        store=False,

    )

    @api.depends('debit', 'credit', 'amount_currency', 'currency_id')

    def _compute_usd_values(self):

        for line in self:

            # Default to 0

            line.debit_usd = 0.0

            line.credit_usd = 0.0

            # Only apply for USD currency lines

            if line.currency_id and line.currency_id.name == 'USD':

                # amount_currency is already in USD

                if line.amount_currency > 0:

                    line.debit_usd = line.amount_currency

                elif line.amount_currency < 0:

                    line.credit_usd = abs(line.amount_currency)

            else:

                # Convert IQD to USD if possible

                usd_currency = self.env['res.currency'].search([('name', '=', 'USD')], limit=1)

                if usd_currency:

                    # Convert using Odoo’s built-in conversion

                    line.debit_usd = line.company_currency_id._convert(

                        line.debit, usd_currency, line.company_id, line.date)

                    line.credit_usd = line.company_currency_id._convert(

                        line.credit, usd_currency, line.company_id, line.date)

amount_currency: already holds the amount in foreign currency (USD in your case)._convert(): handles currency rate conversion using Odoo’s exchange rates.Computed per line (not summed over self) so that each Journal Item shows its corresponding USD value.

Hope it helps.