Function twsapi::examples::order_samples::limit_order_with_cash_qty

pub fn limit_order_with_cash_qty(
    action: &str, 
    quantity: f64, 
    limit_price: f64, 
    cash_qty: f64
) -> Order

Forex orders can be placed in demonination of second currency in pair using cashQty field Requires TWS or IBG 963+ https://www.interactivebrokers.com/en/index.php?f=23876#963-02