Tradingview Pine Script help - how to not duplicate trigger alert

Question

I am having issue with the code below. Apparently this code gives buy/sell plotshapes on the chart, but it gives too many duplicate shapes (multiple buy signals or sell signals in a row). I would like to make it only show once.

Here is the picture of the current code:

enter image description here

And I would like it to look like:

enter image description here

Below is the code I use:

//@version=3
study(title="Money Miner - Trailing Profit/Stoploss - Buy/Sell", overlay = true)

////////////////////////////////////////////////////////////////////////////////INPUTS

nATRPeriod = input(21, "Period")
nATRMultip = input(6.3, "Multiplier",type=float, minval=0.5, maxval=1000, step=0.1)

/////////////////////////////////////////////////////////////////////////////////ATR

xATR = atr(nATRPeriod)
nLoss = nATRMultip * xATR
xATRTrailingStop = na
xATRTrailingStop := iff(close > nz(xATRTrailingStop[1], 0) and close[1] > nz(xATRTrailingStop[1], 0), max(nz(xATRTrailingStop[1]), close - nLoss), iff(close < nz(xATRTrailingStop[1], 0) and close[1] < nz(xATRTrailingStop[1], 0), min(nz(xATRTrailingStop[1]), close + nLoss), iff(close > nz(xATRTrailingStop[1], 0), close - nLoss, close + nLoss)))
 

pos = na
pos := iff(close[1] < nz(xATRTrailingStop[1], 0) and close > nz(xATRTrailingStop[1], 0), 1, iff(close[1] > nz(xATRTrailingStop[1], 0) and close < nz(xATRTrailingStop[1], 0), -1, nz(pos[1], 0)))

color = pos == -1 ? red: pos == 1 ? lime : blue
//patr=plot(xATRTrailingStop, color=color, linewidth=2, title="ATR Trailing Stop", transp=0)

// Deternine if we are currently LONG
isLong = false
isLong := nz(isLong, false)

// Determine if we are currently SHORT
isShort = false
isShort := nz(isShort, false)

//Trading
// Buy only if the buy signal is triggered and we are not already long
LONG = not isLong and pos == 1

// Sell only if the sell signal is triggered and we are not already short
SHORT = not isShort and pos == -1

if (LONG)
    isLong := true
    isShort := false

if (SHORT)
    isLong := false
    isShort := true

barcolor(isLong ? lime : isShort ? red : na)

// Show Break Alerts
plotshape(SHORT, title="Sell", style=shape.labeldown, location=location.abovebar, size=size.normal, text="Sell", transp=0, textcolor = white, color=red, transp=0)
plotshape(LONG, title="Buy", style=shape.labelup, location=location.belowbar, size=size.normal, text="Buy", textcolor = white, color=green, transp=0)

// === /PLOTTING ===
// Send alert to TV alarm sub-system
alertcondition(LONG,title="Sell",message="Sell")
alertcondition(SHORT,title="BuY",message="Buy")
alertcondition(SHORT,title="Sell",message="Sell")
alertcondition(SHORT,title="BuY",message="Buy")

////////////////////////////////////////////////////////////////////////////////VWMA

len2 = input(100, minval=1, title="Smooth")
src = input(close, title="Source")
out = vwma(src, len2)

avg1=avg(out, xATRTrailingStop)
plot(avg1, color=aqua, transp=0, title="ATR")

Really appreciate if you guys can show me the way. I am a total noob in pine script.