#' Determine Gravestoen Doji Pattern using a OHLC price series
#'
#' @param x OHLC prices.
#' @param delta Sensivity
#' @return TRUE if Doji pattern detected
#' @export
#'
gravestone.doji <- function(x,delta=0.1) {
WC <- CandleStickLength(x)
LS <- LowerShadowLength(x)
result <- xts::reclass(delta * WC >= LS & doji(x,delta), x)
colnames(result) <- "gravestone.doji"
return(result)
}
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