Position size for balance's % risk

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

//calculate position size for current balance and specified risk (stop loss) per position; 
//does not take not account commission or spread though, simply adjust risk % to accommodate those

namespace cAlgo.Indicators
{
    [Indicator(IsOverlay = true, AccessRights = AccessRights.None)]
    public class PositionRiskkrp : Indicator
    {

        //percentage of current balance that can be risked (stop loss size in pips) on one position
        [Parameter("Stop Loss Risk %", DefaultValue = 5)]
        public int stopLossRiskPercent { get; set; }

        [Parameter("Stop Loss in Pips", DefaultValue = 10)]
        public int stopLossInPips { get; set; }

        public override void Calculate(int index)
        {
            if (index == 0)
                DisplayPositionSizeRiskOnChart();
        }

        private void DisplayPositionSizeRiskOnChart()
        {



            double costPerPip = (double)((int)(Symbol.PipValue * 10000000)) / 100;

            double positionSizeForRisk = (Account.Balance * stopLossRiskPercent / 100) / (stopLossInPips * costPerPip);

            string text = stopLossRiskPercent + "% x " + stopLossInPips + "pip = " + Math.Round(positionSizeForRisk, 2) + " lot";

            ChartObjects.DrawText("positionRisk", text, StaticPosition.TopRight, Colors.Yellow);

        }
    }
}