#region Namespaces
using System;
using System.IO;
using System.Linq;
#endregion
namespace ScriptCode
{
/// <summary>
/// Pattern scripts are used for recognizing and highlighting chart patterns.
///
/// 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 MyPattern : PatternScriptBase // NEVER CHANGE THE CLASS NAME
{
#region Variables
// The minimum percentage change (open to close) that a candlestick must change in order to be considered a long candlestick.
private double _minCandleSize;
// The maximum percentage change a Doji can have between its opening and closing price.
private double _maxDojiBodySize;
// The maximum percentage change a Doji can have between its highest and lowest price.
private double _maxDojiShadowSizes;
#endregion
#region OnInitialize
/// <summary>
/// This function accepts the user parameters for the script and is called when a new pattern 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 pattern.
///
/// 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="symbolIndex" type="Symbol" default="">The underlying symbol index on which to calculate the pattern script.</param>
/// <param name="minCandleSize" type="Double" default="1">The minimum percentage change (open to close) that a candlestick must change in order to be considered a long candlestick. </param>
/// <param name="maxDojiBodySize" type="Double" default="0.2">The maximum percentage change a Doji can have between its opening and closing price. </param>
/// <param name="maxDojiShadowSizes" type="Double" default="1">The maximum percentage change a Doji can have between its highest and lowest price.</param>
public void OnInitialize(
int symbolIndex,
double minCandleSize,
double maxDojiBodySize,
double maxDojiShadowSizes)
{
_minCandleSize = minCandleSize;
_maxDojiBodySize = maxDojiBodySize;
_maxDojiShadowSizes = maxDojiShadowSizes;
}
#endregion
#region OnBarUpdate
/// <summary>
/// This function is used to determine whether a pattern match exists in which the latest bar is the last bar of the pattern.
/// If such a pattern match is found, the function returns the number of bars in the pattern, otherwise it returns zero.
/// </summary>
/// <returns type="Integer">The total number of bars in the pattern ending at the latest bar (or zero if the pattern is not found).</returns>
public override int OnBarUpdate()
{
// Check whether the first candlestick matches.
if (DataOpen(2) < DataClose(2) && 100 * (DataClose(2) - DataOpen(2)) / DataOpen(2) > _minCandleSize) {
// Check whether the second candlestick matches.
if (DataHigh(2) < DataLow(1) && Math.Abs(100 * (DataOpen(1) - DataClose(1)) / DataOpen(1)) < _maxDojiBodySize && Math.Abs(100 * (DataHigh(1) - DataLow(1)) / DataHigh(1)) < _maxDojiShadowSizes) {
// Check whether the third candlestick matches.
if (DataOpen(0) > DataClose(0) && DataClose(0) > DataOpen(2) && DataClose(0) < DataClose(2) && - 100 * (DataClose(0) - DataOpen(0)) / DataOpen(0) > _minCandleSize) {
return 3;
}
}
}
return 0;
}
#endregion
}
}