Efficient method to access multi timeframe data on many symbols

Hi team, I am trying to call a method to get market data via a foreach on a bunch of symbols. I feel that I am close, but the below is throwing

Error CS0120: An object reference is required for the non-static field, method, or property 'cAlgo.API.Internals.MarketData.GetBars(cAlgo.API.TimeFrame, string)'

This could be an efficient way to get multi timeframe market data for a list of symbols, if there are any suggestions I would be appreciative.

Thanks in advance.

using System;
using System.Linq;
using System.Text;
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 TEST : Robot
    {
        [Parameter(DefaultValue = 0.0)]
        public double Parameter { get; set; }
        public Symbol[] MySymbols;

        protected override void OnStart()
        {
            MySymbols = Symbols.GetSymbols("AUDCAD", "AUDCHF", "AUDJPY", "AUDNZD", "AUDUSD", "CADCHF", "CADJPY", "CHFJPY", "EURAUD", "EURCAD",
            "EURCHF", "EURGBP", "EURJPY", "EURNZD", "EURUSD", "GBPAUD", "GBPCAD", "GBPCHF", "GBPJPY", "GBPNZD",
            "GBPUSD", "NZDCAD", "NZDCHF", "NZDJPY", "NZDUSD", "USDCAD", "USDCHF", "USDJPY");

            foreach (var symbol in MySymbols)
            {
                MyMethod(TimeFrame.Minute, symbol);
            }
        }

        protected override void OnTick()
        {
        }

        public static void MyMethod(TimeFrame _timeframe, Symbol _symbol)
        {
            var _bars = MarketData.GetBars(_timeframe, _symbol.Name);
        }

        protected override void OnStop()
        {

        }
    }
}