Currency conversion is wrong in Cart page

Ok, I got the issue. It seems that price was converted twice, first before adding into cart, and then inside cart page.

I have fixed the problem with a simple hack 🙂

//We are reversing the price of product to USD in cart page, because the rate is applied again there
add_action('woocommerce_before_calculate_totals', 'fix_currency_conversion');
function fix_currency_conversion($cart_object){
            global $WOOCS;
            $cur_currency = $WOOCS->current_currency;
            $currencies = $WOOCS->get_currencies();
            $conversion_rate = $currencies[$WOOCS->current_currency]['rate'];
            if($cur_currency == 'HKD'){
                foreach ( $cart_object->cart_contents as $cart_item_key => $cart_item ) {
                    $cart_item['data']->price = $cart_item['data']->price / $conversion_rate;
                }
            }
}