indicator with exrem function (Pine script)

I've found this code to remove excessive signals through exrem (Buy,Sell) function. How to translate the exrem section and further?

//@version=5
indicator(title='SuperTrend + MACD + EMA', overlay=true)

//EMA
fast_ema = ta.ema(close, 9)
slow_ema = ta.ema(close, 18)
plot(series=fast_ema, title='Fast EMA', color=#00FFFF, linewidth=1)
plot(series=slow_ema, title='Slow EMA', color=#FF00FF, linewidth=1)

//MACD
fastInput = 12
slowInput = 26
[macdLine, signalLine, histLine] = ta.macd(close, fastInput, slowInput, 9)

//Supertrend
atrPeriod = 10
factor = 3
[supertrend, direction] = ta.supertrend(factor, atrPeriod)
linecolor = direction < 0 ? #00ff00 : #ff0000
plot(series=supertrend, title='Supertrend', color=linecolor, linewidth=1)

// Conditions
long_condition = barstate.isconfirmed and
                 fast_ema > slow_ema and
                 macdLine > signalLine and
                 close > supertrend

short_condition = barstate.isconfirmed and
                 fast_ema < slow_ema and
                 macdLine < signalLine and
                 close < supertrend

// Function to Remove Excessive Signals
exrem(condition_1, condition_2) =>
    var entry_signal = 0
    entry_signal := condition_1 ? 1 : condition_2 ? -1 : entry_signal[1]
    entry = entry_signal != entry_signal[1]
    buy = entry and entry_signal == 1
    sell = entry and entry_signal == -1
    [buy, sell]

// Signals
[long_signal, short_signal] = exrem(long_condition, short_condition)

// Plot
plotshape(long_signal, style=shape.triangleup, color=#00FF00, text='BUY', textcolor=#FFFFFF, editable=false, location=location.belowbar, size=size.small)
plotshape(short_signal, style=shape.triangledown, color=#FF0000, text='SELL', textcolor=#FFFFFF, editable=false, location=location.abovebar, size=size.small)