百度的echarts能否给markLine的label添加背景？

项目中遇到如下图的需求

查阅echarts配置项文档发现似乎没有markLine label的样式选项

请问怎么才能给label增加背景呢&＃xff1f;

附&＃xff1a;

在线echarts gallery代码
http://gallery.echartsjs.com/…

echarts配置项文档
http://echarts.baidu.com/opti…

参考&＃xff1a;https://segmentfault.com/q/1010000013784396

var upColor &＃61; &＃39;#ec0000&＃39;;
var upBorderColor &＃61; &＃39;#8A0000&＃39;;
var downColor &＃61; &＃39;#00da3c&＃39;;
var downBorderColor &＃61; &＃39;#008F28&＃39;;
var gridBgColor &＃61; &＃39;#f3f3f3&＃39;;// 数据意义&＃xff1a;开盘(open)&＃xff0c;收盘(close)&＃xff0c;最低(lowest)&＃xff0c;最高(highest)
window.data0 &＃61; splitData([[&＃39;2013/5/16&＃39;, 2221.34,2251.81,2210.77,2252.87],[&＃39;2013/5/17&＃39;, 2249.81,2282.87,2248.41,2288.09],[&＃39;2013/5/20&＃39;, 2286.33,2299.99,2281.9,2309.39],[&＃39;2013/5/21&＃39;, 2297.11,2305.11,2290.12,2305.3],[&＃39;2013/5/22&＃39;, 2303.75,2302.4,2292.43,2314.18],[&＃39;2013/5/23&＃39;, 2293.81,2275.67,2274.1,2304.95],[&＃39;2013/5/24&＃39;, 2281.45,2288.53,2270.25,2292.59],[&＃39;2013/5/27&＃39;, 2286.66,2293.08,2283.94,2301.7],[&＃39;2013/5/28&＃39;, 2293.4,2321.32,2281.47,2322.1],[&＃39;2013/5/29&＃39;, 2323.54,2324.02,2321.17,2334.33],[&＃39;2013/5/30&＃39;, 2316.25,2317.75,2310.49,2325.72],[&＃39;2013/5/31&＃39;, 2320.74,2300.59,2299.37,2325.53],[&＃39;2013/6/3&＃39;, 2300.21,2299.25,2294.11,2313.43],[&＃39;2013/6/4&＃39;, 2297.1,2272.42,2264.76,2297.1],[&＃39;2013/6/5&＃39;, 2270.71,2270.93,2260.87,2276.86],[&＃39;2013/6/6&＃39;, 2264.43,2242.11,2240.07,2266.69],[&＃39;2013/6/7&＃39;, 2242.26,2210.9,2205.07,2250.63],[&＃39;2013/6/13&＃39;, 2190.1,2148.35,2126.22,2190.1]
]);window.currentPriceData &＃61; data0.values.map(v &＃61;> v[0])function splitData(rawData) {var categoryData &＃61; [];var values &＃61; []for (var i &＃61; 0; i }window.calculateMA &＃61; function (dayCount) {var result &＃61; [];for (var i &＃61; 0, len &＃61; data0.values.length; i }option &＃61; {backgroundColor: gridBgColor,title: {text: &＃39;上证指数&＃39;,left: 0},tooltip: {trigger: &＃39;axis&＃39;,axisPointer: {type: &＃39;cross&＃39;}},legend: {data: [&＃39;日K&＃39;, &＃39;MA5&＃39;, &＃39;MA10&＃39;, &＃39;MA20&＃39;, &＃39;MA30&＃39;]},grid: {left: &＃39;5%&＃39;,right: &＃39;15%&＃39;,bottom: &＃39;15%&＃39;},xAxis: {type: &＃39;category&＃39;,data: data0.categoryData,scale: true,boundaryGap : false,axisLine: {onZero: false},splitLine: {show: false},splitNumber: 20,min: &＃39;dataMin&＃39;,max: &＃39;dataMax&＃39;,axisTick: {// show: false,inside: true},axisLabel: {align: "center",showMinLabel: false}},yAxis: {position: &＃39;left&＃39;,// offset: 60,scale: true,// splitArea: {// show: true// },splitLine: {show: false},axisTick: {// show: false,inside: true},axisLabel: {inside: true}},dataZoom: [// {// type: &＃39;inside&＃39;,// start: 50,// end: 100,// zoomLock: true// }// ,{// show: true,// type: &＃39;slider&＃39;,// y: &＃39;90%&＃39;,// start: 50,// end: 100// }],series: [{name: &＃39;日K&＃39;,type: &＃39;candlestick&＃39;,data: data0.values,itemStyle: {normal: {color: upColor,color0: downColor,borderColor: upBorderColor,borderColor0: downBorderColor}},markLine: {symbol: [&＃39;none&＃39;, &＃39;none&＃39;],// symbolSize: [10, 80],// symbolOffset: [60, 50],data: [// {// name: &＃39;min line on close&＃39;,// type: &＃39;min&＃39;,// lineStyle: {// type: "solid"// },// valueDim: &＃39;close&＃39;// },// {// name: &＃39;max line on close&＃39;,// type: &＃39;max&＃39;,// lineStyle: {// type: "solid"// },// valueDim: &＃39;close&＃39;// }]}},{name: &＃39;currentPrice&＃39;,type: &＃39;line&＃39;,data: data0.values.map( v &＃61;> v[0]),smooth: true,lineStyle: {normal: {opacity: 0.1}},markLine: {silent: true,symbol: [&＃39;rect&＃39;],lineStyle: {type: "solid"},data: [[{symbol: &＃39;arrow&＃39;,yAxis: 2290.1,xAxis: &＃39;2013/6/13&＃39;,x: &＃39;90%&＃39;,label: {normal: {position: &＃39;start&＃39;,formatter: &＃39;2290.1&＃39;}},name: &＃39;Y轴值为2290.1 的水平线&＃39;}, {symbol: &＃39;none&＃39;,x: &＃39;5%&＃39;,yAxis: 2290.1}]]}}]
};