VHF

Modified on 2009/03/02 17:10 by Eugene — Categorized as: Standard Indicators

Syntax

public static VHF Series(DataSeries source, int period)
public VHF(DataSeries source, int period, string description)

Parameter Description

source	Price series
period	Indicator calculation period

Description

The Vertical Horizontal Filter was introduced by Adam White in 1991 and is used to determine if prices are trending or are in a congestion stage. It is calculated by dividing the difference in the sums of highest and lowest values by the sum of the absolute values of daily price differences. Typically a period of 28 is used for VHF.

Interpretation

VHF describes how strongly prices are trending. The higher the VHF value, the stronger the trend.

Example

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using WealthLab;
using WealthLab.Indicators;

namespace WealthLab.Strategies
{
	public class MyStrategy : WealthScript
	{
		protected override void Execute()
		{
			// Color chart background when prices are trending according to VHF
			
			DataSeries vhf = VHF.Series( Close, 28 );
			ChartPane VHFPane = CreatePane( 30, true, true );
			PlotSeries( VHFPane, vhf, Color.Red, WealthLab.LineStyle.Solid, 1 );
			
			for(int bar = 28; bar < Bars.Count; bar++)
			{
				if( vhf[bar] > 0.4 )
					SetBackgroundColor( bar, Color.FromArgb(50,0,100,255) );
			}
		}
	}
}