TicksHistoryLoadedEventArgs

using cAlgo.API;
using cAlgo.API.Internals;

namespace cAlgo
{
    // This sample indicator shows how to use TicksHistoryLoadedEventArgs
    public partial class Test : Indicator
    {
        private Ticks _ticks;

        protected override void Initialize()
        {
            // Getting a symbol ticks data
            _ticks = MarketData.GetTicks(InputSymbolName);

            _ticks.HistoryLoaded += OnTicksHistoryLoaded;
            // You can also pass a callback method instead of subscribing to HistoryLoaded event
            //_ticks.LoadMoreHistoryAsync(OnTicksHistoryLoaded);
            _ticks.LoadMoreHistoryAsync();

            _ticks.Reloaded += OnTicksReloaded;
        }

        private void OnTicksReloaded(TicksHistoryLoadedEventArgs obj)
        {
            Print("Ticks got reloaded");
        }

        private void OnTicksHistoryLoaded(TicksHistoryLoadedEventArgs obj)
        {
            Print("New ticks loaded: #{0}", obj.Count);
        }

        public override void Calculate(int index)
        {
        }
    }
}

import clr
clr.AddReference("cAlgo.API")

from cAlgo.API import *
from System import Action

class Test():
    def initialize(self):
        self.ticks = api.MarketData.GetTicks(api.InputSymbolName)
        self.ticks.HistoryLoaded += self.on_ticks_history_loaded
        # You can also pass a callback method instead of subscribing to HistoryLoaded event
        self.ticks.LoadMoreHistoryAsync(Action[TicksHistoryLoadedEventArgs](self.on_ticks_history_loaded))
        self.ticks.LoadMoreHistoryAsync()
        self.ticks.Reloaded += self.on_ticks_reloaded

    def on_ticks_history_loaded(self, args):
        print("New ticks loaded: #", args.Count)

    def on_ticks_reloaded(self, args):
        print("Ticks got reloaded")

{
  "AccessRights": "None",
  "TimeZone": "UTC",
  "IsOverlay": true,
  "Parameters": [
    {
      "Name": "InputSymbolName",
      "DisplayName": "Symbol Name",
      "Type": "String",
      "DefaultValue": "EURUSD"
    }
  ]
}