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Approaching From Above Approaching From Below

IsApproachingAbove(IsApproachingBelow) predicate receives one input line and generates a signal if the value of this line decreases(increases), remaining higher(lower) of the defined level. The smallest value of the interval that the predicate supports equals 2.

Implementation and Usage

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

IsApproachingAbove

IsApproachingBelow

creates new instance of the IsApproachingAbove / IsApproachingBelow  predicate with default period equal to 14 and zero level.

IsApproachingAbove(Int32, Double)

IsApproachingBelow(Int32, Double)

creates new instance of the IsApproachingAbove / IsApproachingBelow predicate with point window.

IsApproachingAbove(TimeSpan, Double)

IsApproachingBelow(TimeSpan, Double)

creates new instance of the IsApproachingAbove / IsApproachingBelow predicate with time window.

The value of the indicators is updated by simple prototype of method Add():

Add(Double)

Add(Double, DateTime)

Use

ApproachingAbove

ApproachingBelow

properties to get the current value.

Example

For the input series, Apple Inc. stock price(bar close price) is used, the defined level equals 236. The period is set to 5.

C#
Copy
 1public partial class InstrumentExecutor : InstrumentExecutorBase
 2{
 3-    #region LocalVariables
 4 
 5     //Is Approaching Above indicator
 6     IsApproachingAbove isAppAbove;
 7     //chart line
 8     Line isAppAboveLine;
 9 
10     #endregion
11
12-    #region Events
13     public override void OnInit()
14     {
15         //init indicator
16         isAppAbove = new IsApproachingAbove(5, 236);
17         //init line
18         isAppAboveLine = Charting.CreateLine("IsAbove", "", Symbol, Pens.Black, LineStyle.Line, Charting.PriceChart, 2);
19     }
20 
21     public override void OnBarClose()
22     {
23         //update value of the indicator
24         isAppAbove.Add(CurrentPrice, CurrentTime);
25         //chart
26         isAppAboveLine.Draw(CurrentTime,isAppAbove.ApproachingAbove);
27     }
28     #endregion
29}
Chart

Approaching From Above Approaching From Below 001