MQL5 リファレンス標準ライブラリトレードクラスCPositionInfoSelect TimeTimeMscTimeUpdateTimeUpdateMscPositionTypeTypeDescriptionMagicIdentifierVolumePriceOpenStopLossTakeProfitPriceCurrentCommissionSwapProfitSymbolCommentInfoIntegerInfoDoubleInfoStringSelectSelectByIndexSelectByMagicSelectByTicketStoreStateCheckState Select 추가 작업을 위한 포지션 선택. bool Select( const string symbol // 기호 \) 매개변수 Symbol [in] 포지션 선택 기호. InfoString SelectByIndex