Converging Diverging

IsConverging (IsDiverging) predicate receives two input lines and generates a signal if during the specified period these lines converge(diverge). Note that the predicate IsApproachingAbove(IsApproachingBelow) can be easily constructed using the predicates IsConverging (IsDiverging), IsAbove(IsBelow):

IsApproachingAbove(TimeSeries, Value) = IsConverging(TimeSeries, Value) and IsAbove(TimeSeries, Value)

Implementation and Usage

These predicates can be used in a strategy with the following constructors:

IsConverging

IsDiverging

creates new instance of the IsConverging / IsDiverging predicate with default period equal to 14.

IsConverging(Int32)

IsDiverging(Int32)

creates new instance of the IsConverging / IsDiverging predicate with point window.

IsConverging(TimeSpan)

IsDiverging(TimeSpan)

creates new instance of the IsConverging / IsDiverging predicate with time window.

The value of the indicators is updated by two series type of method Add():

Add(Double, Double)

Add(Double, Double, DateTime)

Use

Converging

Diverging

properties to get the current value.

Example

For the first series, Apple Inc. stock price(bar close price) is used; for the second series, Sma with the period of 10 is used. The predicates period is set to 5.

Copy

 1public partial class InstrumentExecutor : InstrumentExecutorBase
 2{
 3+LocalVariables 3-    #region LocalVariables
 4 
 5     //Sma indicator
 6     Sma sma;
 7     //Is Converging indicator
 8     IsConverging isConverging;
 9     //chart lines
10     Line isConvergingLine, smaLine;
11 
12     #endregion
13
14+Events14-    #region Events
15     public override void OnInit()
16     {
17         //init indicators
18         sma = new Sma(20);
19         isConverging = new IsConverging(5);
20 
21         //init lines
22         smaLine = Charting.CreateLine("Sma", "", Symbol, Pens.Blue, LineStyle.Line, Charting.PriceChart, 1);
23 
24         isConvergingLine = Charting.CreateLine("IsConverging", "", Symbol, Pens.Black, LineStyle.Line, Charting.PriceChart, 2);
25     }
26 
27     public override void OnBarClose()
28     {
29         //update values of the indicators
30         sma.Add(CurrentPrice, CurrentTime);
31         isConverging.Add(CurrentPrice, sma.SMA, CurrentTime);
32 
33         //get values and chart
34         smaLine.Draw(CurrentTime, sma.SMA);
35         isConvergingLine.Draw(CurrentTime, isConverging.Converging);
36     }
37     #endregion
38}

Chart

Converging Diverging 001