Convert Pine Script indicator to MT5 indicator

//@version=5
indicator('TESTJAN', overlay=true)

amplitude = input(title='Amplitude', defval=2)
channelDeviation = input(title='Channel Deviation', defval=2)

showArrows = input(title='Show Arrows', defval=true)
showChannels = input(title='Show Channels', defval=true)

var int trend = 0
var int nextTrend = 0
var float maxLowPrice = nz(low[1], low)
var float minHighPrice = nz(high[1], high)

var float up = 0.0
var float down = 0.0
var float atrHigh = 0.0
var float atrLow = 0.0
var float arrowUp = na
var float arrowDown = na

atr2 = ta.atr(100) / 2
dev = channelDeviation * atr2

highPrice = high[math.abs(ta.highestbars(amplitude))]
lowPrice = low[math.abs(ta.lowestbars(amplitude))]
highma = ta.sma(high, amplitude)
lowma = ta.sma(low, amplitude)

if nextTrend == 1
        maxLowPrice := math.max(lowPrice, maxLowPrice)
        if highma < maxLowPrice and close < nz(low[1], low)
                trend := 1
                nextTrend := 0
                minHighPrice := highPrice
                minHighPrice
else
        minHighPrice := math.min(highPrice, minHighPrice)
        if lowma > minHighPrice and close > nz(high[1], high)
                trend := 0
                nextTrend := 1
                maxLowPrice := lowPrice
                maxLowPrice
if trend == 0
        if not na(trend[1]) and trend[1] != 0
                up := na(down[1]) ? down : down[1]
                arrowUp := up - atr2
                arrowUp
        else
                up := na(up[1]) ? maxLowPrice : math.max(maxLowPrice, up[1])
                up
                atrHigh := up + dev
                atrLow := up - dev
                atrLow
else
        if not na(trend[1]) and trend[1] != 1
                down := na(up[1]) ? up : up[1]
                arrowDown := down + atr2
                arrowDown
        else
                down := na(down[1]) ? minHighPrice : math.min(minHighPrice, down[1])
                down
                atrHigh := down + dev
                atrLow := down - dev
                atrLow

ht = trend == 0 ? up : down

var color buyColor = color.rgb(0, 68, 255)
var color sellColor = color.rgb(255, 115, 0)

htColor = trend == 0 ? buyColor : sellColor
htPlot = plot(ht, title='aghighi signal', linewidth=2, color=htColor)

atrHighPlot = plot(showChannels ? atrHigh : na, title='ATR High', style=plot.style_circles, color=sellColor)
atrLowPlot = plot(showChannels ? atrLow : na, title='ATR Low', style=plot.style_circles, color=buyColor)

fill(htPlot, atrHighPlot, title='ATR High Ribbon', color=sellColor)
fill(htPlot, atrLowPlot, title='ATR Low Ribbon', color=buyColor)

buySignal = not na(arrowUp) and trend == 0 and trend[1] == 1
sellSignal = not na(arrowDown) and trend == 1 and trend[1] == 0

plotshape(showArrows and buySignal ? atrLow : na, title='Arrow Up', style=shape.triangleup, location =location.absolute, size=size.tiny, color=buyColor)
plotshape(showArrows and sellSignal ? atrHigh : na, title='Arrow Down', style=shape.triangledown, location=location.absolute, size=size.tiny, color=sellColor)

alertcondition(buySignal, title='Alert: Signal Buy', message=' Signal Buy')
alertcondition(sellSignal, title='Alert: Signal Sell', message=' Signal Sell')