Sel buy

//@version=4
study(title="forexoz", overlay = true)

// Inputs
a = input(1, title = "Key Vaule. 'This changes the sensitivity'")
c = input(10, title = "ATR Period")
h = input(false, title = "Signals from Heikin Ashi Candles")

xATR = atr(c)
nLoss = a * xATR

src = h ? security(heikinashi(syminfo.tickerid), timeframe.period, close, lookahead = false) : close

xATRTrailingStop = 0.0
xATRTrailingStop := iff(src > nz(xATRTrailingStop, 0) and src > nz(xATRTrailingStop, 0), max(nz(xATRTrailingStop), src - nLoss),
iff(src < nz(xATRTrailingStop, 0) and src < nz(xATRTrailingStop, 0), min(nz(xATRTrailingStop), src + nLoss),
iff(src > nz(xATRTrailingStop, 0), src - nLoss, src + nLoss)))

pos = 0
pos := iff(src < nz(xATRTrailingStop, 0) and src > nz(xATRTrailingStop, 0), 1,
iff(src > nz(xATRTrailingStop, 0) and src < nz(xATRTrailingStop, 0), -1, nz(pos, 0)))

xcolor = pos == -1 ? color.red: pos == 1 ? color.green : color.blue

ema = ema(src,1)
above = crossover(ema, xATRTrailingStop)
below = crossover(xATRTrailingStop, ema)

buy = src > xATRTrailingStop and above
sell = src < xATRTrailingStop and below

barbuy = src > xATRTrailingStop
barsell = src < xATRTrailingStop

plotshape(buy, title = "Buy", text = 'Buy', style = shape.labelup, location = location.belowbar, color= color.green, textcolor = color.white, transp = 0, size = size.tiny)
plotshape(sell, title = "Sell", text = 'Sell', style = shape.labeldown, location = location.abovebar, color= color.red, textcolor = color.white, transp = 0, size = size.tiny)

barcolor(barbuy ? color.green : na)
barcolor(barsell ? color.red : na)

alertcondition(buy, "UT Long", "UT Long")
alertcondition(sell, "UT Short", "UT Short")