TA.EMA

```TA.EMA()```函数的返回值为：一维数组。
array

TA.EMA(inReal)
TA.EMA(inReal, optInTimePeriod)

```inReal```参数用于指定K线数据。
inReal
true
{@struct/Record Record}结构数组、数值数组
```optInTimePeriod```参数用于设置周期。
optInTimePeriod
false
number

```javascript
function main(){
    var records = exchange.GetRecords()
    // 判断K线bar数量是否满足指标计算周期
    if (records && records.length > 9) {
        var ema = TA.EMA(records, 9)          
        Log(ema)
    }
}

def main():
    r = exchange.GetRecords()
    if r and len(r) > 9:
        ema = TA.EMA(r, 9)
        Log(ema)

void main() {
    auto r = exchange.GetRecords();
    if(r.Valid && r.size() > 9) {
        auto ema = TA.EMA(r, 9);
        Log(ema);
    }
}

测试TA.EMA()函数：

TA.EMA()函数的optInTimePeriod参数的默认值为：9。

{@fun/TA/TA.MACD TA.MACD}, {@fun/TA/TA.KDJ TA.KDJ}, {@fun/TA/TA.RSI TA.RSI}, {@fun/TA/TA.ATR TA.ATR}, {@fun/TA/TA.OBV TA.OBV}, {@fun/TA/TA.MA TA.MA}, {@fun/TA/TA.BOLL TA.BOLL}, {@fun/TA/TA.Alligator TA.Alligator}, {@fun/TA/TA.CMF TA.CMF}, {@fun/TA/TA.Highest TA.Highest}, {@fun/TA/TA.Lowest TA.Lowest}