MQL5 リファレンス標準ライブラリトレードクラスCAccountInfoTradeAllowed LoginTradeModeTradeModeDescriptionLeverageStopoutModeStopoutModeDescriptionMarginModeMarginModeDescriptionTradeAllowedTradeExpertLimitOrdersBalanceCreditProfitEquityMarginFreeMarginMarginLevelMarginCallMarginStopOutNameServerCurrencyCompanyInfoIntegerInfoDoubleInfoStringOrderProfitCheckMarginCheckFreeMarginCheckMaxLotCheck TradeAllowed 거래 허용량의 플래그 가져오기. bool TradeAllowed() const 값 반환 거래 허용량의 플래그. MarginModeDescription TradeExpert