private static List <int> GetWaitForUpdateOpenDates_FillUp(List <int> allOpenDates, TradingDayCache currentOpenDateCache) { List <int> waitForUpdateOpenDates = new List <int>(); for (int i = 0; i < allOpenDates.Count; i++) { int openDate = allOpenDates[i]; if (!currentOpenDateCache.IsTrade(openDate)) { waitForUpdateOpenDates.Add(openDate); } } return(waitForUpdateOpenDates); }