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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.

Signature 

1
public abstract interface DirectionalMovementSystem

Namespace

cAlgo.API.Indicators

Examples

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 //...
 [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] = Bars.ClosePrices[index] + Symbol.TickSize*100;
         }
         else
         {
             Buy[index] = Bars.ClosePrices[index] - Symbol.TickSize*100;
         }
     }
 }
 //...

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 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);
             }
         }
     }
 }

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 import clr
 clr.AddReference("cAlgo.API")
 from cAlgo.API import *
 class Test():    
     def initialize(self):
         # Periods is parameter defined in C# file of indicator
         self.dms = api.Indicators.DirectionalMovementSystem(api.Period)
     def calculate(self, index):
         # Sell and Buy are outputs defined in C# file of indicator
         if self.dms.DIMinus[index] > self.dms.DIPlus[index]:
             api.Sell[index] = api.Bars.ClosePrices[index] + api.Symbol.TickSize * 100
         else:
             api.Buy[index] = api.Bars.ClosePrices[index] - api.Symbol.TickSize * 100

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 """
 VolumeInLots, Periods, StopLossInPips, TakeProfitInPips, and Label are parameters defined in C# file of cBot.
 """
 import clr
 clr.AddReference("cAlgo.API")
 # Import cAlgo API types
 from cAlgo.API import *
 # Import trading wrapper functions
 from robot_wrapper import *
 class DirectionalMovementSystemSample():
     def on_start(self):
         self.volumeInUnits = api.Symbol.QuantityToVolumeInUnits(api.VolumeInLots)
         self.detrendedPriceOscillator  = api.Indicators.DirectionalMovementSystem(api.Periods)
     def on_bar_closed(self):
         if self.detrendedPriceOscillator.ADX.Last(0) < api.AdxLevel:
             return
         if self.detrendedPriceOscillator.DIPlus.Last(0) > self.detrendedPriceOscillator.DIMinus.Last(0) and self.detrendedPriceOscillator.DIPlus.Last(1) <= self.detrendedPriceOscillator.DIMinus.Last(1):
             self.close_positions(TradeType.Sell)
             api.ExecuteMarketOrder(TradeType.Buy, api.SymbolName, self.volumeInUnits, api.Label, api.StopLossInPips, api.TakeProfitInPips)
         elif self.detrendedPriceOscillator.DIPlus.Last(0) < self.detrendedPriceOscillator.DIMinus.Last(0) and self.detrendedPriceOscillator.DIPlus.Last(1) >= self.detrendedPriceOscillator.DIMinus.Last(1):
             self.close_positions(TradeType.Buy)
             api.ExecuteMarketOrder(TradeType.Sell, api.SymbolName, self.volumeInUnits, api.Label, api.StopLossInPips, api.TakeProfitInPips)
     def get_bot_positions(self):
         return api.Positions.FindAll(api.Label)
     def close_positions(self, tradeType):
         for position in self.get_bot_positions():
             if position.TradeType != tradeType:
                 continue
             api.ClosePosition(position)

Properties

ADX

Summary

The Average Directional Movement Index (ADX) indicates whether the market is trending or ranging.

Signature 

1
public abstract IndicatorDataSeries ADX {get;}

Return Value

IndicatorDataSeries

Examples

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 //...
 [Robot]
 public class SampleRobot : Robot
 //...
 private DirectionalMovementSystem _dms;
 protected override void Initialize()
 {
     _dms = Indicators.DirectionalMovementSystem(Period);
 }
 //...
 protected override void OnBar()
 {
     Print("The Current Average Directional Movement Index is: {0}", _dms.ADX.LastValue);
 }
 //...

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 import clr
 clr.AddReference("cAlgo.API")
 # Import cAlgo API types
 from cAlgo.API import *
 # Import trading wrapper functions
 from robot_wrapper import *
 class Test():
     def on_start(self):
         # Periods is parameter defined in C# file of cBot
         self.dms = api.Indicators.DirectionalMovementSystem(api.Period)
     def on_bar(self):
         print(f"The Current Average Directional Movement Index is: {self.dms.ADX.LastValue}")

DIPlus

Summary

The Positive Direction Indicator (+DI) indicates upward trend movement.

Signature 

1
public abstract IndicatorDataSeries DIPlus {get;}

Return Value

IndicatorDataSeries

Examples

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 //...
 [Robot]
 public class SampleRobot : Robot
 //...
 private DirectionalMovementSystem _dms;
 protected override void Initialize()
 {
     _dms = Indicators.DirectionalMovementSystem(Period);
 }
 //...
 protected override void OnBar()
 {
     Print("The Current Positive Direction Indicator (+DI) is: {0}", _dms.DIPlus.LastValue);
 }
 //...

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 import clr
 clr.AddReference("cAlgo.API")
 # Import cAlgo API types
 from cAlgo.API import *
 # Import trading wrapper functions
 from robot_wrapper import *
 class Test():
     def on_start(self):
         # Periods is parameter defined in C# file of cBot
         self.dms = api.Indicators.DirectionalMovementSystem(api.Period)
     def on_bar(self):
         print(f"The Current Positive Direction Indicator (+DI) is: {self.dms.DIPlus.LastValue}")

DIMinus

Summary

The Negative Direction Indicator (-DI) indicates downward trend movement.

Signature 

1
public abstract IndicatorDataSeries DIMinus {get;}

Return Value

IndicatorDataSeries

Examples

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 //...
 [Robot]
 public class SampleRobot : Robot
 //...
 private DirectionalMovementSystem _dms;
 protected override void Initialize()
 {
     _dms = Indicators.DirectionalMovementSystem(Period);
 }
 //...
 protected override void OnBar()
 {
     Print("The Current Negative Direction Indicator (-DI) is: {0}", _dms.DIMinus.LastValue);
 }
 //...

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 import clr
 clr.AddReference("cAlgo.API")
 # Import cAlgo API types
 from cAlgo.API import *
 # Import trading wrapper functions
 from robot_wrapper import *
 class Test():
     def on_start(self):
         # Periods is parameter defined in C# file of cBot
         self.dms = api.Indicators.DirectionalMovementSystem(api.Period)
     def on_bar(self):
         print(f"The Current Positive Direction Indicator (-DI) is: {self.dms.DIMinus.LastValue}")