markPoint的label定位echarts 折线配置项内容和展示

markPoint的label定位, position, 如何相对于整个图来定位, 而不是根据markPoint的位置啊?

      var option = {
			grid: {
				left: 14,
				right: 270,
				top: 14,
				bottom: 14,
				containLabel: true,
				show: false,
			},
			xAxis: [{
				type: 'value',
				boundaryGap: false,
				axisLine: {
					show: false,
				},
				axisTick: {
					show: false
				},
				axisLabel: {
					show: false,	
				},
				splitLine: {
					lineStyle: {
						color: 'transparent',
					},
				},
			}],
			yAxis: [{
				type: 'value',
				boundaryGap: false,
				axisLine: {
					show: false,
				},
				axisTick: {
					show: false
				},
				axisLabel: {
					color: '#c4c4c4',
				},
				splitLine: {
					lineStyle: {
						color: 'transparent',
					},
				},
			}],
			series: [{
				type: 'line',
				areaStyle: {
					color: {
						type: 'linear',
						x: 0,
						y: 0,
						x2: 0,
						y2: 1,
						colorStops: [{
							offset: 0,
							color: 'rgba(99,217,139,.2)' // 0% 处的颜色
							// color:'red'
						}, {
							offset: 0.2,
							color: 'rgba(99,217,139,.2)' // 0% 处的颜色
							// color:'red'
						},{
							offset: 0.2,
							color: 'rgba(99,217,139,.4)' // 0% 处的颜色
							// color:'yellow'
						},{
							offset: 1,
							color: 'rgba(99,217,139,.4)' // 100% 处的颜色
							// color:'yellow'
						}],
						globalCoord: false // 缺省为 false
					}
				},
				itemStyle: {
					color: '#63D98B '
				},
				smooth: true,
				data: [
					[0, 0],
					[23, 50],
					[24, 60],
					[14, 70],
					[35, 80],
					[15, 90],
					[12, 105],
					[0, 120],
				],
				markPoint: {
					symbol: 'circle',
					symbolSize: 1,
					label: {
						show: true,
						position: [0,0],
						formatter: [
							'{a|你在这里}'
						].join('\n'),
						rich: {
							a: {
								color: '#000',
								fontSize: '14',
								width: 110,
								height: 32,
								align: 'center',
							}
						}

					},
					data: [{
						name: '你的坐标',
						x:200,
						y:200
					}]
				}
			}]
		}