Parallel processing in Indicators and cBots

Hello,

I was just wondering what components of the Automate API were thread-safe? I am investigating the use of Parallel processing to improve the performance of some of my indicators & cBots. However, I often get errors such as “Unable to invoke target method in current thread. Use `BeginInvokeOnMainThread` method”, which I presume means that whatever I'm doing is not thread-safe?

Here's my test code.

using cAlgo.API;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace cAlgo {
	[Indicator(AccessRights = AccessRights.None)]
	public class ParallelTasks : Indicator {
		
	
		protected override void Initialize() {

			var symbolLabels = new List<string>();

			foreach (var p in Positions) {
				if (!symbolLabels.Contains(p.SymbolName)) symbolLabels.Add(p.SymbolName);
			}

			Parallel.ForEach(symbolLabels, sn => {
				var symbol = Symbols.GetSymbol(sn);
				Print("Symbol {0} loaded", sn);
			});

		}

		public override void Calculate(int index) {

		}
	}
}

I suspect that using the ‘BeginInvokeOnMainThread’ method might make it work, but would negate any advantage of the parallel processing?

Many thanks,

Mat