add.rule(strategy.st, name = "ruleSignal", 
         arguments = list(sigcol = "filterexit", 
                          sigval = TRUE, orderqty = "all", 
                          ordertype = "market",
                          orderside = "long", 
                          replace = FALSE, prefer = "Open"),
         type = "exit")

• replace：TRUE 时取消其他信号，否则为 FALSE

• prefer：选择入场价位

  • K 线：open、high、low、close
  • 默认：在下一天/下一根 K 线的收盘价买入