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# Maximum (MAX)

## Description

Returns the highest value over the specified period.

## Syntax

`MAX(int period)`

`MAX(ISeries\<double\> input, int period)`

**Returns default value**

`MAX(int period)[int barsAgo]`

`MAX(ISeries\<double\> input, int period)[int barsAgo]`

## Return Value

**double;** Accessing this method via an index value **\[int barsAgo]** returns the indicator value of the referenced bar.

## Parameters

| Parameter | Description                                                                                     |
| --------- | ----------------------------------------------------------------------------------------------- |
| input     | Indicator source data ([Series\<T>](/developer/desktop-sdk/references/common/iseriest/seriest)) |
| period    | Number of bars used in the calculation                                                          |

## Examples

```csharp
// Prints the highest high value over the last 20 periods
double value = MAX(High, 20)[0];
Print("The current MAX value is " + value.ToString());

// Note the above call with a barsAgo of 0 includes the current MAX of the input high series in the value. If we want to check for example for a break of this value, storing the last bar's MAX would be needed.
double value = MAX(High, 20)[1];

if (High[0] > value)
    Draw.ArrowUp(this, CurrentBar.ToString(), true, 0, Low[0] - TickSize, Brushes.Blue);
```

## Source Code

You can view this indicator method source code by selecting the menu New > NinjaScript Editor > Indicators within the NinjaTrader Control Center window.