---
id: "M:cAlgo.API.Internals.IIndicatorsAccessor.TradeVolumeIndex(cAlgo.API.DataSeries)"
kind: "method"
type: "T:cAlgo.API.Internals.IIndicatorsAccessor"
url: "https://help.ctrader.com/ctrader-algo/references/Indicators/IIndicatorsAccessor/TradeVolumeIndex/"
---

> Documentation index for agents: https://help.ctrader.com/ctrader-algo/llms.txt · machine index: https://help.ctrader.com/ctrader-algo/api.json

# IIndicatorsAccessor.TradeVolumeIndex

Member of [IIndicatorsAccessor](https://help.ctrader.com/ctrader-algo/references/Indicators/IIndicatorsAccessor/index.md).

## TradeVolumeIndex(DataSeries source)

Trade Volume Index indicator measures the amount of money flowing in and out of an asset.

Environments: Desktop supported · CLI supported · Cloud supported.

C#:

```csharp
TradeVolumeIndex TradeVolumeIndex(DataSeries source)
```

Python:

```python
api.Indicators.TradeVolumeIndex(source: DataSeries) -> TradeVolumeIndex
```

### Parameters

- `source` (`DataSeries`, Python `DataSeries`): The price source data used for the calculation.

### Returns

`TradeVolumeIndex` — Trade Volume Index indicator instance

### Examples

C#:

```csharp
var tradeVolumeIndex = Indicators.TradeVolumeIndex(Bars.ClosePrices);
Print("Trade Volume Index: {0}", tradeVolumeIndex.Result.LastValue);
```

Python:

```python
tradeVolumeIndex = api.Indicators.TradeVolumeIndex(api.Bars.ClosePrices)
api.Print(f"Trade Volume Index: {tradeVolumeIndex.Result.LastValue}")
```