return null;
        }
        int nMarketDataCount = (int) marketList.GetMarketDataCount();
        for (int i = 0; i < nMarketDataCount; i++) {
            MarketData marketData = marketList.GetMarketData(i);
            if (marketData == null) {
                continue;
            }
            if (marketID.equals(marketData.getMarket_id())) {