---
title: tripleEMA() function
description: tripleEMA() returns the triple exponential moving average (TEMA) of values in the _value column.
url: https://docs.influxdata.com/flux/v0/stdlib/universe/tripleema/
estimated_tokens: 1482
product: Flux
version: v0
---

# tripleEMA() function

-   Flux 0.38.0+
-   View InfluxDB support

`tripleEMA()` returns the triple exponential moving average (TEMA) of values in the `_value` column.

`tripleEMA` uses `n` number of points to calculate the TEMA, giving more weight to recent data with less lag than `exponentialMovingAverage()` and `doubleEMA()`.

#### Triple exponential moving average rules

-   A triple exponential moving average is defined as `tripleEMA = (3 * EMA_1) - (3 * EMA_2) + EMA_3`.
    -   `EMA_1` is the exponential moving average of the original data.
    -   `EMA_2` is the exponential moving average of `EMA_1`.
    -   `EMA_3` is the exponential moving average of `EMA_2`.
-   A true triple exponential moving average requires at least requires at least `3 * n - 2` values. If not enough values exist to calculate the TEMA, it returns a `NaN` value.
-   `tripleEMA()` inherits all `exponentialMovingAverage()` rules.

##### Function type signature

```js
(<-tables: stream[{A with _value: B}], n: int) => stream[C] where B: Numeric, C: Record
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### n

(Required) Number of points to use in the calculation.

### tables

Input data. Default is piped-forward data (`<-`).

## Examples

### Calculate a three point triple exponential moving average

```js
import "sampledata"

sampledata.int()
    |> tripleEMA(n: 3)
```

[](#view-example-input-and-output)

View example input and output

#### Input data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 10 | t1 |
| 2021-01-01T00:00:20Z | 7 | t1 |
| 2021-01-01T00:00:30Z | 17 | t1 |
| 2021-01-01T00:00:40Z | 15 | t1 |
| 2021-01-01T00:00:50Z | 4 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | -3 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |

#### Output data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:50Z | 7.6250000000000036 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:50Z | 4.0729166666666625 | t2 |

#### Related

-   [movingAverage() function](/flux/v0/stdlib/universe/movingaverage/)
-   [doubleEMA() function](/flux/v0/stdlib/universe/doubleema/)
-   [timedMovingAverage() function](/flux/v0/stdlib/universe/timedmovingaverage/)
-   [exponentialMovingAverage() function](/flux/v0/stdlib/universe/exponentialmovingaverage/)
-   [InfluxQL TRIPLE\_EXPONENTIAL\_MOVING\_AVERAGE()](/influxdb/v1/query_language/functions/#triple-exponential-moving-average)

[transformations](/flux/v0/tags/transformations/)