# Price Momentum Oscillator (PMO)

Created by Carl Swenlin, the DecisionPoint Price Momentum Oscillator is double-smoothed momentum indicator based on Rate of Change (ROC). [Discuss]

```
// usage
IEnumerable<PmoResult> results =
quotes.GetPmo(timePeriods, smoothPeriods, signalPeriods);
```

## Parameters

`timePeriods`

* int* - Number of periods (

`T`

) for ROC EMA smoothing. Must be greater than 1. Default is 35.`smoothPeriods`

* int* - Number of periods (

`S`

) for PMO EMA smoothing. Must be greater than 0. Default is 20.`signalPeriods`

* int* - Number of periods (

`G`

) for Signal line EMA. Must be greater than 0. Default is 10.### Historical quotes requirements

You must have at least `N`

periods of `quotes`

, where `N`

is the greater of `T+S`

,`2×T`

, or `T+100`

to cover the convergence periods. Since this uses multiple smoothing operations, we recommend you use at least `N+250`

data points prior to the intended usage date for better precision.

`quotes`

is a collection of generic `TQuote`

historical price quotes. It should have a consistent frequency (day, hour, minute, etc). See the Guide for more information.

## Response

```
IEnumerable<PmoResult>
```

- This method returns a time series of all available indicator values for the
`quotes`

provided. - It always returns the same number of elements as there are in the historical quotes.
- It does not return a single incremental indicator value.
- The first
`T+S-1`

periods will have`null`

values for PMO since there’s not enough data to calculate.

Convergence warning: The first`T+S+250`

periods will have decreasing magnitude, convergence-related precision errors that can be as high as ~5% deviation in indicator values for earlier periods.

### PmoResult

`Date`

* DateTime* - Date from evaluated

`TQuote`

`Pmo`

* double* - Price Momentum Oscillator

`Signal`

* double* - Signal line is EMA of PMO

### Utilities

See Utilities and helpers for more information.

## Chaining

This indicator may be generated from any chain-enabled indicator or method.

```
// example
var results = quotes
.Use(CandlePart.HL2)
.GetPmo(..);
```

Results can be further processed on `Pmo`

with additional chain-enabled indicators.

```
// example
var results = quotes
.GetPmo(..)
.GetRsi(..);
```