Here's an example:
EURUSD
close 1.15200
open 1.15000
contract_size 100 000
volume 1 lot
account in USD (or USD cents)
USD is quote currency here, so convert rate = 1
(1.15200 - 1.15000) * 100 000 * 1 = 0.00200 * 100 000 = 200 (USD/USD cent). So, profit is 200 * 1 = 200 (USD/or USD cent)
USDJPY
close 113.200
open 113.000
contract_size 100 000
volume 1 lot
account in USD (or USD cents)
JPY is quote currency, convert rate = 1/113 (for this example, depends on open price)
(113.200-113.000) * 100 000 * 1 = 0.2 * 100 000 = 20 000 (JPY/or JPY cent)
So, profit is 20 000 / 113 = 176.99 (USD/or USD cent)