CSPThreeBlackCrows: Three Black Crows Candlestick Pattern
In candlesticks: Candlestick Pattern Recognition

Description Usage Arguments Details Value Note Author(s) References See Also Examples

Look for Three Black Crows in a Open/Close price series

1	CSPThreeBlackCrows(TS, strict=TRUE, n=20, minbodysizeMedian=1)

`TS`	xts Time Series containing Open and Close prices
`strict`	if FALSE, use less strict conditions to detect pattern. See details.
`n`	number of preceding candles to calculate median candle length
`minbodysizeMedian`	minimum candle length in relation to the median candle length of `n` preceding candles

Number of candle lines: 3

The market forms a uptrend. The pattern is characterized by three long candlesticks stepping downward like a staircase. In strict mode, the opening of each day is higher than the previous close but lower than the previous open. When strict=FALSE, candle 2 and/or 3 of the formation may open lower than the previous day's close, thus forming a gap.

A xts object containing the column:

ThreeBlackCrows

TRUE if Three Black Crows pattern detected

The function filters patterns that look like three black crows, without considering the current trend direction. If only pattern in uptrends should be filtered, a external trend detection function must be used. See examples.

Andreas Voellenklee

The following site(s) were used to code/document this indicator:
http://www.candlesticker.com/Bullish.asp
http://www.candlesticker.com/Bearish.asp

ThreeWhiteSoldiers CSPNLongBlackCandles CSPNLongBlackCandleBodies CSPThreeLineStrike

## Not run: 
  getSymbols('YHOO',adjust=TRUE)
  CSPThreeBlackCrows(YHOO)
  CSPThreeBlackCrows(YHOO, strict=FALSE)
  
  # filter for three black crows that occur in uptrends
  ThreeBlackCrows <- CSPThreeBlackCrows(YHOO) & 
    TrendDetectionChannel(lag(YHOO,k=3))[,"UpTrend"]
    
  # how often does that occur?
  colSums(ThreeBlackCrows, na.rm=TRUE)

## End(Not run)