Looking for current price > previous day high . Works fine but plotting for all the 5 minutes candle - pine-script-v5

Question

Here is my usecase :
if currentprice of 5 minutes candle is greater than previous day high , plot the chart with the 'x' mark in green .
If currentprice of 5 minutes candle is lesser than previous day low , plot the chart with 'x' mark in green
This script prints the 'x' mark for every 5 minutes but I want to plot only first for the first time when condition is met
I used a counter to check if it is a new day but seems that is not working as expected
//#version=5
indicator("HLPrice", max_lines_count = 11, overlay=true)
emaValue8 = ta.ema(close,8)
emaValue21 = ta.ema(close,21)
vwapValue = ta.vwap(hlc3)
// to highlight the session
timeframe = "1D"
isNewDay = timeframe.change(timeframe)
bgcolor(isNewDay ? color.new(color.green, 80) : na)
[dh,dl,dc] = request.security(syminfo.ticker, "D", [high[1],low[1], close[1]], lookahead=barmerge.lookahead_on)
isNewDayy = time("D") != time("D")[1]
var plotcond = false
greaterThanPreviousDayHigh = false
lesserThanPreviousDayLow = false
if isNewDayy
plotcond := true
if close[0] > dh and plotcond
greaterThanPreviousDayHigh:=true
if close[0] < dl and plotcond
lesserThanPreviousDayLow:=true
plotshape(series=greaterThanPreviousDayHigh , title="Candle on All EMAs" ,color = color.green, size=size.tiny)
plotshape(series=lesserThanPreviousDayLow , title="Candle on All EMAs" ,color = color.red, size=size.tiny)