MQL5 リファレンス標準ライブラリ科学的チャートCCurveYMax TypeNameColorXMaxXMinYMaxYMinSizePointsSizePointsFillPointsColorGetXGetYLinesStyleLinesIsSmoothLinesSmoothTensionLinesSmoothStepLinesEndStyleLinesWidthHistogramWidthCustomPlotCBDataCustomPlotFunctionPointsTypeStepsDimensionTrendLineCoefficientsTrendLineColorTrendLineVisibleUpdateVisible YMax Y 함수의 최대값을 반환 (실수만 해당). double YMax() 값 반환 Y 함수의 최대값 (실수만 해당). XMin YMin