Summary:
This indicator shows the minimum indicator value of the last n bars.

Calculation:
Complex, see script.

                    
#region Namespaces using System; using System.IO; using System.Linq; #endregion namespace ScriptCode { /// <summary> /// Indicator scripts are used for calculating a series of numerical values. /// /// This script can be used in several ways: /// (1) It can be used on a chart. /// (2) It can be used from another script. /// (3) It can be used as a script column in a watchlist. /// </summary> public partial class MyIndicator : IndicatorScriptBase // NEVER CHANGE THE CLASS NAME { #region Variables // Use for the underlying indicator on which to calculate the indicator script. private Indicator _indicator; // Use for the number of periods to include in the indicator script calculation. private int _periods; // Use for the bar that contains the last min. private int _lastBar; // Use for the last minimum value. private double _lastMin; // Use for the bar containing the last min within latest bar. private int _runningBar; // Use for the minimum value within latest bar. private double _runningMin; // Use for the last variables on start of a new bar. private int _thisBar; #endregion #region OnInitialize /// <summary> /// This function accepts the user parameters for the script and is called when a new indicator instance is created. /// One of the parameters accepted by it must be that of a symbol or another script that is /// based on a symbol (drawing, indicator, pattern or signal). This symbol will be used as the underlying symbol for the indicator. /// /// The parameter values can be specified from the user interface (UI) or from another script, depending on usage. /// </summary> /// -------------------------------------------------------------------------------------------------- /// PLEASE USE THE SCRIPT WIZARD (CTRL+W) TO ADD, EDIT AND REMOVE THE SCRIPT PARAMETERS /// -------------------------------------------------------------------------------------------------- /// YOU MUST SET A PARAM TAG FOR EACH PARAMETER ACCEPTED BY THIS FUNCTION. /// ALL PARAM TAGS SHOULD BE SET IN THE 'OnInitialize' REGION, RIGHT ABOVE THE 'OnInitialize' FUNCTION. /// THE ORDER OF THE TAGS MUST MATCH THE ORDER OF THE ACTUAL PARAMETERS. /// REQUIRED ATTRIBUTES: /// (1) name: The exact parameter name. /// (2) type: The type of data to collect from the user: /// Set to "Integer" when the data type is 'int' /// Set to "IntegerArray" when the data type is 'int[]' /// Set to "DateTime" when the data type is 'long' /// Set to "DateTimeArray" when the data type is 'long[]' /// Set to "Boolean" when the data type is 'bool' /// Set to "BooleanArray" when the data type is 'bool[]' /// Set to "Double" when the data type is 'double' /// Set to "DoubleArray" when the data type is 'double[]' /// Set to "String" when the data type is 'string' /// Set to "StringArray" when the data type is 'string[]' /// Set to "Indicator" when the data type is 'Indicator' /// Set to "Pattern" when the data type is 'Pattern' /// Set to "Signal" when the data type is 'Signal' /// Set to "Drawing" when the data type is 'Drawing' /// Set to "Symbol" when the data type is 'int' representing a symbol index. /// OPTIONAL ATTRIBUTES: /// (3) default: The default parameter value is only valid when the type is Integer, Boolean, Double, String or an API Type. /// (4) min: The minimum parameter value is only valid when the type is Integer or Double. /// (5) max: The maximum parameter value is only valid when the type is Integer or Double. /// EXAMPLE: <param name="" type="" default="" min="" max="">Enter the parameter description here.</param> /// -------------------------------------------------------------------------------------------------- /// <param name="indicator" type="Indicator">Use for the underlying indicator on which to calculate the indicator script.</param> /// <param name="periods" type="Integer" default="14" min="1">Use for the number of periods to include in the indicator script calculation.</param> public void OnInitialize( Indicator indicator, int periods) { // Set the indicator. _indicator = indicator; // Set the number of periods. _periods = periods; } #endregion #region OnBarUpdate /// <summary> /// This function is used for calculating the indicator value for the latest bar (see the Indicator functions). /// </summary> /// <returns>The indicator value for the latest bar.</returns> public override double OnBarUpdate() { // Initalize first bar values. if (IndicatorValueCount() == 0) { _runningMin = _indicator[0]; _lastMin = _indicator[0]; _runningBar = 0; _lastBar = 0; _thisBar = 0; return _indicator[0]; } // When min is no longer within the period find new min. if (IndicatorValueCount() - _runningBar >= _periods) { _runningMin = double.MaxValue; for (int barsBack = Math.Min(IndicatorValueCount(), _periods - 1); barsBack > 0; barsBack--) if (_indicator[barsBack] <= _runningMin) { _runningMin = _indicator[barsBack]; _runningBar = IndicatorValueCount() - barsBack; } } // Set values on new bar. if (_thisBar != IndicatorValueCount()) { _lastMin = _runningMin; _lastBar = _runningBar; _thisBar = IndicatorValueCount(); } // Update min with latest input. if (_indicator[0] <= _lastMin) { _runningMin = _indicator[0]; _runningBar = IndicatorValueCount(); } else { _runningMin = _lastMin; _runningBar = _lastBar; } // Output MIN. return _runningMin; } #endregion #region OnChartSetup /// <summary> /// This function is used for setting up the indicator on the chart and registering its pens (see the IndicatorRegisterPen function). /// </summary> public override void OnChartSetup() { // Register a pen. IndicatorRegisterPen(0, "Pen", IQ_Color.DARK_ORANGE, IQ_DashStyle.SOLID, 2); } #endregion #region OnSelectPen /// <summary> /// This function is used for selecting a registered indicator pen with which to color the latest indicator value. /// Call the IndicatorRegisterPen function from the OnChartSetup function in order to register an indicator pen. /// </summary> /// <returns>The indicator pen index to use for coloring the latest indicator value.</returns> public override byte OnSelectPen() { // OnSelectPen Content return 0; } #endregion } }

The Algorithmic Trading Software for Hedge Funds and Quants