添加折线
_this.MALine5 = _this.chart.chart().createStudy('Moving Average', false, false, [5], null, {'Plot.color': '#642d92'});
_this.MALine10 = _this.chart.chart().createStudy('Moving Average', false, false, [10], null, {'Plot.color': '#5278a3'});
_this.MALine30 = _this.chart.chart().createStudy('Moving Average', false, false, [30], null, {'Plot.color': '#238031'});
_this.MALine60 = _this.chart.chart().createStudy('Moving Average', false, false, [60], null, {'Plot.color': '#850058'});
隐藏折线
_this.chart.chart().getStudyById(_this.MALine5).setVisible(false);
_this.chart.chart().getStudyById(_this.MALine10).setVisible(false);
_this.chart.chart().getStudyById(_this.MALine30).setVisible(false);
_this.chart.chart().getStudyById(_this.MALine60).setVisible(false);
需要注意的是以上方法均在 onchartready里面执行