help me with this strategy

[bergimax]

hello!
i would like to create a strategy with crossabove and below the ema with indicator. Any idea? i try this but it isn't correct:
if (CrossBelow(DMI(14),EMA(DMI, 14), 1))
Many thank's for the assistance and have a fantastic 2015!

[NinjaTrader_Bertrand]

bergimax, thanks for the wishes - we all wish you a great 2015 as well!

The snippet looks correct, however from your chart - the DMI is just overlaid on the price data, correct? So both are using different scales then, so you will not get a 'true' crossover a system could act on.

[bergimax]

thank's for the replay!
tell me if i understand correctly. the two different indicator is overlying.the ema over the dmi. Using the Crossover it don't look the Cross exactly? if yes, can i use this?

if(DMI[1]>=EMA(DMI, 14)[1] &&
DMI[0]<EMA(DMI, 14)[0])
what do you think?

[NinjaTrader_Bertrand]

bergimax, that should work as well. My comment was in relation to your screenshot - here it looks like you look for crossovers with the DMI and the EMA of the prices.

[bergimax]

ahh ok!!! i do create an apposite indicator in your opinion? and if yes i modify the dmi in what way?
thank's

[NinjaTrader_Bertrand]

Would not be aware of an easy workaround, as those would not really cross - this is just a visual effect then for working on different scales. You can see what you program would see if both the price based EMA and the DMI would be set on the same scale.

[bergimax]

ok! i create an indicator that works with the same scale but i not find the code to insert the crosses in my startegy..

/// <summary>
/// Directional Movement Index. Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
[Description("The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.")]
public class DMIEma : Indicator
{
#region Variables
private int period = 14;
private int periodEma = 14;
private DataSeries dmMinus;
private DataSeries dmPlus;
private DataSeries tr;
#endregion
/// <summary>
/// This method is used to configure the indicator and is called once before any bar data is loaded.
/// </summary>
protected override void Initialize()
{
Add(new Plot(Color.Green, "DMI"));
Add(new Plot(Color.Orange, "EMA"));
dmMinus = new DataSeries(this);
dmPlus = new DataSeries(this);
tr = new DataSeries(this);
}
/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
if (CurrentBar == 0)
{
dmMinus.Set(0);
dmPlus.Set(0);
tr.Set(High[0] - Low[0]);
Value.Set(0);
}
else
{
dmMinus.Set(Low[1] - Low[0] > High[0] - High[1] ? Math.Max(Low[1] - Low[0], 0) : 0);
dmPlus.Set(High[0] - High[1] > Low[1] - Low[0] ? Math.Max(High[0] - High[1], 0) : 0);
tr.Set(Math.Max(High[0] - Low[0], Math.Max(Math.Abs(High[0] - Close[1]), Math.Abs(Low[0] - Close[1]))));
double diPlus = (SMA(tr, Period)[0] == 0) ? 0 : SMA(dmPlus, Period)[0] / SMA(tr, Period)[0];
double diMinus = (SMA(tr, Period)[0] == 0) ? 0 : SMA(dmMinus, Period)[0] / SMA(tr, Period)[0];
Value.Set((diPlus + diMinus == 0) ? 0 : (diPlus - diMinus) / (diPlus + diMinus));
Values[1].Set(EMA(Value, PeriodEma)[0]);
}
}
#region Properties
/// <summary>
/// </summary>
[Description("Numbers of bars used for calculations")]
[GridCategory("Parameters")]
public int Period
{
get { return period; }
set { period = Math.Max(1, value); }
}

[Description("Numbers of bars used for calculations")]
[GridCategory("Parameters")]
public int PeriodEma
{
get { return periodEma; }
set { periodEma = Math.Max(1, value); }
}

#endregion
}
}
#region NinjaScript generated code. Neither change nor remove.
// This namespace holds all indicators and is required. Do not change it.
namespace NinjaTrader.Indicator
{
public partial class Indicator : IndicatorBase
{
private DMIEma[] cacheDMIEma = null;
private static DMIEma checkDMIEma = new DMIEma();
/// <summary>
/// The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
/// <returns></returns>
public DMIEma DMIEma(int period, int periodEma)
{
return DMIEma(Input, period, periodEma);
}
/// <summary>
/// The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
/// <returns></returns>
public DMIEma DMIEma(Data.IDataSeries input, int period, int periodEma)
{
if (cacheDMIEma != null)
for (int idx = 0; idx < cacheDMIEma.Length; idx++)
if (cacheDMIEma[idx].Period == period && cacheDMIEma[idx].PeriodEma == periodEma && cacheDMIEma[idx].EqualsInput(input))
return cacheDMIEma[idx];
lock (checkDMIEma)
{
checkDMIEma.Period = period;
period = checkDMIEma.Period;
checkDMIEma.PeriodEma = periodEma;
periodEma = checkDMIEma.PeriodEma;
if (cacheDMIEma != null)
for (int idx = 0; idx < cacheDMIEma.Length; idx++)
if (cacheDMIEma[idx].Period == period && cacheDMIEma[idx].PeriodEma == periodEma && cacheDMIEma[idx].EqualsInput(input))
return cacheDMIEma[idx];
DMIEma indicator = new DMIEma();
indicator.BarsRequired = BarsRequired;
indicator.CalculateOnBarClose = CalculateOnBarClose;
#if NT7
indicator.ForceMaximumBarsLookBack256 = ForceMaximumBarsLookBack256;
indicator.MaximumBarsLookBack = MaximumBarsLookBack;
#endif
indicator.Input = input;
indicator.Period = period;
indicator.PeriodEma = periodEma;
Indicators.Add(indicator);
indicator.SetUp();
DMIEma[] tmp = new DMIEma[cacheDMIEma == null ? 1 : cacheDMIEma.Length + 1];
if (cacheDMIEma != null)
cacheDMIEma.CopyTo(tmp, 0);
tmp[tmp.Length - 1] = indicator;
cacheDMIEma = tmp;
return indicator;
}
}
}
}
// This namespace holds all market analyzer column definitions and is required. Do not change it.
namespace NinjaTrader.MarketAnalyzer
{
public partial class Column : ColumnBase
{
/// <summary>
/// The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
/// <returns></returns>
[Gui.Design.WizardCondition("Indicator")]
public Indicator.DMIEma DMIEma(int period, int periodEma)
{
return _indicator.DMIEma(Input, period, periodEma);
}
/// <summary>
/// The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
/// <returns></returns>
public Indicator.DMIEma DMIEma(Data.IDataSeries input, int period, int periodEma)
{
return _indicator.DMIEma(input, period, periodEma);
}
}
}
// This namespace holds all strategies and is required. Do not change it.
namespace NinjaTrader.Strategy
{
public partial class Strategy : StrategyBase
{
/// <summary>
/// The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
/// <returns></returns>
[Gui.Design.WizardCondition("Indicator")]
public Indicator.DMIEma DMIEma(int period, int periodEma)
{
return _indicator.DMIEma(Input, period, periodEma);
}
/// <summary>
/// The Directional Movement Index is quite similiar to Welles Wilder's Relative Strength Index. The difference is the DMI uses variable time periods (from 3 to 30) vs. the RSI's fixed periods.
/// </summary>
/// <returns></returns>
public Indicator.DMIEma DMIEma(Data.IDataSeries input, int period, int periodEma)
{
if (InInitialize && input == null)
throw new ArgumentException("You only can access an indicator with the default input/bar series from within the 'Initialize()' method");
return _indicator.DMIEma(input, period, periodEma);
}
}
}
#endregion