Moving Average Results by Symbol

In the example below, how can I get the results to be for GPDUSD regardless of what chart it is attached to?

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

namespace cAlgo
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class SampleTrendcBot : Robot
    {
        private MovingAverage slowMa;
        private MovingAverage fastMa;

        protected override void OnStart()
        {
        }

        protected override void OnTick()
        {

            fastMa = Indicators.MovingAverage(MarketSeries.Close, 4, MovingAverageType.WilderSmoothing);
            slowMa = Indicators.MovingAverage(MarketSeries.Close, 8, MovingAverageType.WilderSmoothing);

            var currentSlowMa = slowMa.Result.Last(0);
            var currentFastMa = fastMa.Result.Last(0);
            var previousSlowMa = slowMa.Result.Last(1);
            var previousFastMa = fastMa.Result.Last(1);

            if (previousSlowMa > previousFastMa && currentSlowMa <= currentFastMa)
            {
                ChartObjects.DrawText("Status", "Buy", StaticPosition.TopLeft, Colors.Red);
            }
            else if (previousSlowMa < previousFastMa && currentSlowMa >= currentFastMa)
            {
                ChartObjects.DrawText("Status", "Sell", StaticPosition.TopLeft, Colors.Red);
            }
            else
            {
                ChartObjects.DrawText("Status", "Wait", StaticPosition.TopLeft, Colors.Red);
            }
        }
    }
}