//Only prints HH HL LL LH
//@version=3
study("HH HL LH LL", overlay =true)
lb = input(3, title="Left Bars", minval = 1)
rb = input(6, title="Right Bars", minval = 1)
mb = lb + rb + 1
ph = iff(not na(high[mb]), iff(highestbars(high, mb) == -lb, high[lb], na), na) // Pivot High
pl = iff(not na(low[mb]), iff(lowestbars(low, mb) == -lb, low[lb], na), na) // Pivot Low
hl = na
hl := iff(ph, 1, iff(pl, -1, na)) // Trend direction
zz = na
zz := iff(ph, ph, iff(pl, pl, na)) // similar to zigzag but may have multiple highs/lows
zz :=iff(pl and hl == -1 and valuewhen(hl, hl, 1) == -1 and pl > valuewhen(zz, zz, 1), na, zz)
zz :=iff(ph and hl == 1 and valuewhen(hl, hl, 1) == 1 and ph < valuewhen(zz, zz, 1), na, zz)
hl := iff(hl==-1 and valuewhen(hl, hl, 1)==1 and zz > valuewhen(zz, zz, 1), na, hl)
hl := iff(hl==1 and valuewhen(hl, hl, 1)==-1 and zz < valuewhen(zz, zz, 1), na, hl)
zz := iff(na(hl), na, zz)
findprevious()=> // finds previous three points (b, c, d, e)
ehl = iff(hl==1, -1, 1)
loc1 = 0.0, loc2 = 0.0, loc3 = 0.0, loc4 = 0.0
xx = 0
for x=1 to 1000
if hl[x]==ehl and not na(zz[x])
loc1 := zz[x]
xx := x + 1
break
ehl := hl
for x=xx to 1000
if hl[x]==ehl and not na(zz[x])
loc2 := zz[x]
xx := x + 1
break
ehl := iff(hl==1, -1, 1)
for x=xx to 1000
if hl[x]==ehl and not na(zz[x])
loc3 := zz[x]
xx := x + 1
break
ehl := hl
for x=xx to 1000
if hl[x]==ehl and not na(zz[x])
loc4 := zz[x]
break
[loc1, loc2, loc3, loc4]
a = na, b = na, c = na, d = na, e = na
if not na(hl)
[loc1, loc2, loc3, loc4] = findprevious()
a := zz
b := loc1
c := loc2
d := loc3
e := loc4
_hh = zz and (a > b and a > c and c > b and c > d)
_ll = zz and (a < b and a < c and c < b and c < d)
_hl = zz and ((a >= c and (b > c and b > d and d > c and d > e)) or (a < b and a > c and b < d))
_lh = zz and ((a <= c and (b < c and b < d and d < c and d < e)) or (a > b and a < c and b > d))
plotshape(_hl, text="HL", title="Higher Low", style=shape.labelup, color=lime, textcolor=black, location=location.belowbar, transp=0, offset = -lb)
plotshape(_hh, text="HH", title="Higher High", style=shape.labeldown, color=lime, textcolor=black, location=location.abovebar, transp=0, offset = -lb)
plotshape(_ll, text="LL", title="Lower Low", style=shape.labelup, color=red, textcolor=white, location=location.belowbar, transp=0, offset = -lb)
plotshape(_lh, text="LH", title="Lower High", style=shape.labeldown, color=red, textcolor=white, location=location.abovebar, transp=0, offset = -lb)
.
