private void handleTradeMsg(
            MamdaOptionContract contract,
            MamdaSubscription subscription,
            MamaMsg msg,
            mamaMsgType msgType)
        {
            MamdaTradeListener tradeListener = contract.getTradeListener();

            if (tradeListener != null)
            {
                tradeListener.onMsg(subscription, msg, msgType);
            }
        }