//@version=4
study("DMG-signals", overlay=true) 

inp_src = input(title="TBX по ", type=input.source, defval=open)

length = timeframe.isintraday and timeframe.multiplier >= 1 ? 1440 / timeframe.multiplier * 7 : timeframe.isintraday and timeframe.multiplier < 60 ? 60 / timeframe.multiplier * 24 * 7 : 7
    
dev = stdev(close, length)
upper = highest(close, length)[1]
lower = lowest(close, length)[1]
upper1 = upper + dev
lower1 = lower - dev

highRatio = (close - lower1) / (upper1 - lower1) * 500
lowRatio = -(upper1 - close) / (upper1 - lower1) * 500

z = highRatio + lowRatio

longCond  = crossover(z, 100)
shortCond = crossunder(z, -100)

sectionLongs = 0
sectionLongs := nz(sectionLongs[1])
sectionShorts = 0
sectionShorts := nz(sectionShorts[1])

if longCond
    sectionLongs := sectionLongs + 1
    sectionShorts := 0

if shortCond
    sectionLongs := 0
    sectionShorts := sectionShorts + 1

longCondition  = longCond and sectionLongs <= 1
shortCondition = shortCond and sectionShorts <= 1

last_open_longCondition  = float(na)
last_open_shortCondition = float(na)
last_open_longCondition  := longCondition  ? open : nz(last_open_longCondition[1])
last_open_shortCondition := shortCondition ? open : nz(last_open_shortCondition[1])

last_longCondition  = float(na)
last_shortCondition = float(na)
last_longCondition  := longCondition  ? time : nz(last_longCondition[1])
last_shortCondition := shortCondition ? time : nz(last_shortCondition[1])

in_longCondition  = last_longCondition  > last_shortCondition
in_shortCondition = last_shortCondition > last_longCondition

plotshape(longCondition,  title="buy alert",  color=color.green, textcolor=color.green, transp=0, style=shape.triangleup,   location=location.belowbar, size=size.small, text="LONG",  offset=0)
plotshape(shortCondition, title="sell alert", color=color.red,   textcolor=color.red,   transp=0, style=shape.triangledown, location=location.abovebar, size=size.small, text="SHORT", offset=0)