#20-尋找高低點4.pine

//@version=4
study("教學：尋找高低點4", overlay=true)

// 尋找高低點4：完善前一個程式，除了顯示高點，也顯示低點
// highest、lowest的使用，但是讓使用者可以自行變更初始值，再加上低點顯示

barnum = input(title="左右K棒數", defval=4, type=input.integer, minval=2)
cond = high[barnum] == highest(high, barnum*2+1)
cond2= low[barnum]  == lowest(low, barnum*2+1)

//plotchar(cond, char="*", text="H", location=location.abovebar, offset=-barnum)  
//plotchar(cond2, char="*", text="L", location=location.belowbar, offset=-barnum) 


if cond
    labelh = label.new(x=bar_index-barnum, y=na, text="H", 
             size=size.normal, color=#EEEEEE, textcolor=color.red, yloc=yloc.abovebar, 
             style=label.style_label_down
             )

if cond2
    lablel = label.new(x=bar_index-barnum, y=na, text="L", 
             size=size.normal, color=#EEEEEE, textcolor=color.green, yloc=yloc.belowbar, style=label.style_label_up
             )