BarsHistoryLoadedEventArgs.Count

public int Count {get;}

barsHistoryLoadedEventArgs.Count: int

protected override void OnStart()
{
    Bars.HistoryLoaded += OnBarsHistoryLoaded;
    Bars.LoadMoreHistoryAsync();
}

private void OnBarsHistoryLoaded(BarsHistoryLoadedEventArgs args)
{
    Print("Loaded {0} more bars", args.Count);
}

def on_start(self):
    api.Bars.HistoryLoaded += self.on_bars_history_loaded
    api.Bars.LoadMoreHistoryAsync()

def on_bars_history_loaded(self, args):
    api.Print(f"Loaded {args.Count} more bars")