MQL5 リファレンス標準ライブラリトレードクラスCAccountInfoMargin LoginTradeModeTradeModeDescriptionLeverageStopoutModeStopoutModeDescriptionMarginModeMarginModeDescriptionTradeAllowedTradeExpertLimitOrdersBalanceCreditProfitEquityMarginFreeMarginMarginLevelMarginCallMarginStopOutNameServerCurrencyCompanyInfoIntegerInfoDoubleInfoStringOrderProfitCheckMarginCheckFreeMarginCheckMaxLotCheck Margin 예약된 마진 금액 가져오기. double Margin() const 값 반환 예약된 마진 금액(예금 통화). Equity FreeMargin