Issue with getting Volume amount right (US30)

Hi

When I'm trying to get a volume for new position, out of risk percentage number, Im getting wrong values for US30

        protected override void OpenPosition()
        {
            // Initialize
            double RequestedPrice;
            TradeType TradeDirection;
            double OrderVolume;
            double RangeSize = 3;

            //// Open Position
            if (Trader.CurrentPosition == null)
            {

                if (TradeLogic(true, out buy))
                {
                    if (buy)
                    {
                        TradeDirection = TradeType.Buy;
                        RequestedPrice = Symbol.Bid;
                    }
                    else
                    {
                        TradeDirection = TradeType.Sell;
                        RequestedPrice = Symbol.Ask;
                    }

                    //// Volume calculation. Gives wrong numbers for base currencies other than account's currency + US30 wrong value
                    OrderVolume = (Account.Balance * Profile.TradingMargin_int / 100) * Account.PreciseLeverage; // Profile.TradingMargin_int = 20 (which is 20% of account balance)
                    OrderVolume = OrderVolume % 1000 >= 500 ? OrderVolume + 1000 - OrderVolume % 1000 : OrderVolume - OrderVolume % 1000; // Normalize volume

                    Trader.LatestOperation = ExecuteMarketRangeOrder(TradeDirection, Trader.symbol.Name, OrderVolume, RangeSize, RequestedPrice, "Label", Profile.StopLoss_double, Profile.TakeProfit_double); // Profile.StopLoss_double & Profile.TakeProfit_double = 6, 15
                    Trader.CurrentPosition = Trader.LatestOperation.Position;
                }

            }
        }

------------------

Account: 1'000 GBP (Profile.TradingMargin_int = 20, Leverage = 400)

Volume result for EURJPY / USDCHF: 80'000 (correct)

Volume result for XTIUSD: 20'000 (correct)

Volume result for US30: 40'000 (incorrect, should be 1?) <<