MQL5 リファレンス標準ライブラリ科学的チャートCCurveType TypeNameColorXMaxXMinYMaxYMinSizePointsSizePointsFillPointsColorGetXGetYLinesStyleLinesIsSmoothLinesSmoothTensionLinesSmoothStepLinesEndStyleLinesWidthHistogramWidthCustomPlotCBDataCustomPlotFunctionPointsTypeStepsDimensionTrendLineCoefficientsTrendLineColorTrendLineVisibleUpdateVisible Type 곡선 유형 반환. ENUM_CURVE_TYPE Type() 값 반환 곡선 유형. CCurve Name