This ProBuilder script is designed to identify potential trend reversals by tracking higher highs and higher lows for uptrends, and lower highs and lower lows for downtrends. It visually represents these points on a chart and provides signals for possible entry points based on these patterns.

PeriodsInMinorSwing=20
hhminorprice=0
llminorprice=close*1000
for i = 1 to PeriodsInMinorSwing*2 do
    if high[i]>hhminorprice then
        hhminorbar = barindex[i]
        hhminorprice = high[i]
        $LL[II]=LLminorprice
        II=I+1
    endif
    if low[i]2 and b>2 then
    uptrend = $top[a-1]>$top[a-2] and $bot[b-1]>$bot[b-2]
    dntrend = $top[a-1]<$top[a-2] and $bot[b-1]<$bot[b-2]
    if uptrend and close>$top[a-1] and close[1]<$top[a-1] and lastsig<>$top[a-1] then
        drawarrowup(barindex,low) coloured("green")
        lastsig =$top[a-1]
    endif
    if dntrend and close<$bot[b-1] and close[1]>$bot[b-1] and lastsig<>$bot[b-1] then
        drawarrowdown(barindex,high) coloured("crimson")
        lastsig =$bot[b-1]
    endif
endif
return

The code operates by performing the following steps:

• Initialization: Sets initial values for tracking the highest high and lowest low within a specified number of bars (PeriodsInMinorSwing).
• Loop through bars: Iterates through each bar within the range to update the highest high and lowest low values and their corresponding bar indices.
• Drawing segments: If the current bar index minus the bar index of the last highest high or lowest low equals the PeriodsInMinorSwing, a horizontal line is drawn at these levels to indicate a potential area of resistance or support.
• Signal detection: Checks if there are at least three recorded highs and lows to start analyzing trends. It then determines the trend direction based on the relationship between the most recent highs and lows. If a breakout occurs, it draws an arrow indicating a potential entry point.

This script is useful for traders looking to automate the detection of trend reversals based on classic technical analysis techniques.