MQL5 リファレンス標準ライブラリトレードクラスCAccountInfoLogin LoginTradeModeTradeModeDescriptionLeverageStopoutModeStopoutModeDescriptionMarginModeMarginModeDescriptionTradeAllowedTradeExpertLimitOrdersBalanceCreditProfitEquityMarginFreeMarginMarginLevelMarginCallMarginStopOutNameServerCurrencyCompanyInfoIntegerInfoDoubleInfoStringOrderProfitCheckMarginCheckFreeMarginCheckMaxLotCheck Login 계좌 번호 가져오기. long Login() const 값 반환 계좌 번호. CAccountInfo TradeMode