DirectionalMovementSystem


Summary

The Welles Wilder's Directional Movement Indicator calculation.

Remarks

Welles Wilder's Directional Movement System uses three indicators to determine whether the market is trending, and in which direction, and sends trading signals accordingly. A buy signal occurs when +DI line crosses above -DI line. A sell signal occurs when -DI line crosses below +DI line.

Syntax

public interface DirectionalMovementSystem

Members

NameTypeSummary
ADX PropertyThe Average Directional Movement Index (ADX) indicates whether the market is trending or ranging.
DIMinus PropertyThe Negative Direction Indicator (-DI) indicates downward trend movement.
DIPlus PropertyThe Positive Direction Indicator (+DI) indicates upward trend movement.

Example 1

//...
[Indicator(IsOverlay = true)]
public class SampleADX : Indicator
{
    private DirectionalMovementSystem _dms;
    private double _dIplus;
    private double _dIminus;
    [Parameter("ADX Period", DefaultValue = 14)]
    public int Period { get; set; }
    [Output("Buy", PlotType = PlotType.Points, Color = Colors.Green, Thickness = 4)]
    public IndicatorDataSeries Buy { get; set; }
    [Output("Sell", PlotType = PlotType.Points, Color = Colors.Red, Thickness = 4)]
    public IndicatorDataSeries Sell { get; set; }
    protected override void Initialize()
    {
        _dms = Indicators.DirectionalMovementSystem(Period);
    }
    public override void Calculate(int index)
    {
        _dIplus = _dms.DIPlus[index];
        _dIminus = _dms.DIMinus[index];
        if (_dIminus > _dIplus)
        {
            Sell[index] = MarketSeries.Close[index] + Symbol.PointSize*100;
        }
        else
        {
            Buy[index] = MarketSeries.Close[index] - Symbol.PointSize*100;
        }
    }
}
//...

Example 2

using cAlgo.API;
using cAlgo.API.Indicators;
namespace cAlgo.Robots
{
    // This sample cBot shows how to use the Directional Movement System indicator
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class DirectionalMovementSystemSample : Robot
    {
        private double _volumeInUnits;
        private DirectionalMovementSystem _directionalMovementSystem;
        [Parameter("Volume (Lots)", DefaultValue = 0.01)]
        public double VolumeInLots { get; set; }
        [Parameter("Stop Loss (Pips)", DefaultValue = 10)]
        public double StopLossInPips { get; set; }
        [Parameter("Take Profit (Pips)", DefaultValue = 10)]
        public double TakeProfitInPips { get; set; }
        [Parameter("Label", DefaultValue = "Sample")]
        public string Label { get; set; }
        public Position[] BotPositions
        {
            get
            {
                return Positions.FindAll(Label);
            }
        }
        protected override void OnStart()
        {
            _volumeInUnits = Symbol.QuantityToVolumeInUnits(VolumeInLots);
            _directionalMovementSystem = Indicators.DirectionalMovementSystem(20);
        }
        protected override void OnBar()
        {
            if (_directionalMovementSystem.ADX.Last(1) < 25) return;
            if (_directionalMovementSystem.DIPlus.Last(1) > _directionalMovementSystem.DIMinus.Last(1) && _directionalMovementSystem.DIPlus.Last(2) <= _directionalMovementSystem.DIMinus.Last(2))
            {
                ClosePositions(TradeType.Sell);
                ExecuteMarketOrder(TradeType.Buy, SymbolName, _volumeInUnits, Label, StopLossInPips, TakeProfitInPips);
            }
            else if (_directionalMovementSystem.DIPlus.Last(1) < _directionalMovementSystem.DIMinus.Last(1) && _directionalMovementSystem.DIPlus.Last(2) >= _directionalMovementSystem.DIMinus.Last(2))
            {
                ClosePositions(TradeType.Buy);
                ExecuteMarketOrder(TradeType.Sell, SymbolName, _volumeInUnits, Label, StopLossInPips, TakeProfitInPips);
            }
        }
        private void ClosePositions(TradeType tradeType)
        {
            foreach (var position in BotPositions)
            {
                if (position.TradeType != tradeType) continue;
                ClosePosition(position);
            }
        }
    }
}
Reference