NinjaScript > Language Reference > Common > System Indicator Methods

Description

The Rate of Change (ROC) indicator is a very simple yet effective momentum oscillator that measures the percent change in price from one period to the next. The ROC calculation compares the current price with the price n periods ago.

... Courtesy of StockCharts

Syntax

ROC(int period)
ROC(ISeries<double> input, int period)

Returns default value
ROC(int period)[int barsAgo]
ROC(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

input	Indicator source data (?)
period	Number of bars used in the calculation

Examples


// Prints the current value of a 20 period ROC using default price type double value = ROC(20)[0]; Print("The current ROC value is " + value.ToString()); // Prints the current value of a 20 period ROC using high price type double value = ROC(High, 20)[0]; Print("The current ROC value is " + value.ToString());

Source Code

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