Change lot size

Hello,

I an looking to change the lot size to 1.5X after every loss instead of doubling the trade after every loss. Is this possible? Here is the code.

using System;
using System.Linq;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class MartingaleRobot : Robot
    {
        [Parameter("Initial Volume", DefaultValue = 10000, MinValue = 0)]
        public int InitialVolume { get; set; }

        [Parameter("Stop Loss", DefaultValue = 40)]
        public int StopLoss { get; set; }

        [Parameter("Take Profit", DefaultValue = 40)]
        public int TakeProfit { get; set; }

        private Random random = new Random();

        protected override void OnStart()
        {
            Positions.Closed += OnPositionsClosed;

            ExecuteOrder(InitialVolume, GetRandomTradeType());
        }

        private void ExecuteOrder(long volume, TradeType tradeType)
        {
            var result = ExecuteMarketOrder(tradeType, Symbol, volume, "Martingale", StopLoss, TakeProfit);

            if (result.Error == ErrorCode.NoMoney)
                Stop();
        }

        private void OnPositionsClosed(PositionClosedEventArgs args)
        {
            Print("Closed");
            var position = args.Position;

            if (position.Label != "Martingale" || position.SymbolCode != Symbol.Code)
                return;

            if (position.GrossProfit > 0)
            {
                ExecuteOrder(InitialVolume, GetRandomTradeType());
            }
            else
            {
                ExecuteOrder((int)position.Volume * 2, position.TradeType);
            }
        }

        private TradeType GetRandomTradeType()
        {
            return random.Next(2) == 0 ? TradeType.Buy : TradeType.Sell;
        }
    }
}