Tuesday, September 07, 2010

Bearish Downside Tasuki Gap [DDTG]

Descripton
Rules:
1. The first candlestick is a long red candlestick.
2. The second candlestick is a long red candlestick which gaps below the first candlestick.
3. The third candlestick is a green candlestick which opens in the body range of the second candlestick and in the gap between the first candlestick and the second candlestick.

Pattern Type:
Bearish Continuation.


Variables
TypeIdentifierDescription
Integer_symbolIndexUse for the underlying symbol index on which to calculate the Bearish Downside Tasuki Gap.
Number_minCandleSizeUse for the minimum percentage change (open to close) that a candlestick must change in order to be considered a long candlestick. [Default 2]

OnInitialize
Function Parameters
TypeIdentifierDescription
SymbolsymbolIndexUse for the underlying symbol index on which to calculate the Bearish Downside Tasuki Gap.
NumberminCandleSizeUse for the minimum percentage change (open to close) that a candlestick must change in order to be considered a long candlestick. [Default 1]
Implementation
	 ' Assign the parameters to script variables.
	_symbolIndex = symbolIndex
	_minCandleSize = minCandleSize

OnPattern
Function Parameters
TypeIdentifierDescription
IntegerbarIndex
Implementation
	 ' Get the opening prices of the symbol, indexed by bar index. 
	Define open() As Number = BarOpen(_symbolIndex, barIndex, 3)
	 ' Get the highest prices of the symbol, indexed by bar index. 
	Define high() As Number = BarHigh(_symbolIndex, barIndex, 3)
	 ' Get the lowest prices of the symbol, indexed by bar index. 
	Define low() As Number = BarLow(_symbolIndex, barIndex, 3)
	 ' Get the closing prices of the symbol, indexed by bar index. 
	Define close() As Number = BarClose(_symbolIndex, barIndex, 3)
	 ' Check whether the first candlestick matches.
	If (open(2) > close(2) And _
	    -100 * (close(2) - open(2)) / open(2) > _minCandleSize) Then
		 ' Check whether the second candlestick matches.
		If (open(1) > close(1) And _
			low(2) > high(1) And _
			-100 * (close(1) - open(1)) / open(1) > _minCandleSize) Then
			 ' Check whether the third candlestick matches.
			If (open(0) < close(0) And _ 
				close(1) < open(0) And _
				open(1) > open(0) And _
				low(2) > close(0) And _
				high(1) < close(0)) Then
				Return 3
			End If
		End If
	End If
	Return 0

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