This ProBuilder code snippet is designed to find the nearest fractal low to a specified price level within a limited number of bars. It utilizes fractal lows to determine potential support levels in trading data.

// settings
priceLevel = 1.17178
FractalPeriod = 3
barLimit = 200

// defining low fractals
cp=FractalPeriod
if low[cp] <= lowest[2*cp+1](low) then LL= -1 else LL=0 endif if LL = -1 then LOL = low[cp] DRAWTEXT("▲",barindex[cp],lol,Dialog,Bold,12) fractal=lol endif // looking for the nearest fractal to priceLevel diff=priceLevel*10 lastfractal=0 lastdiff=0 for i = 0 to barLimit-1 do if fractal[i]>0 and lastFractal<>fractal[i] then
        diff=min(diff,abs(fractal[i]-priceLevel))
        if diff<>lastdiff then
            nearestFractal=fractal[i]
        endif
        lastFractal=fractal[i]
        lastdiff=diff
    endif
next

return nearestFractal,pricelevel coloured(200,200,0)

This code snippet performs the following steps:

• Setting Parameters: Defines the price level of interest, the period for fractal calculation, and the limit of historical bars to consider.
• Defining Low Fractals: Identifies fractal lows based on the given fractal period. A fractal low is marked if the low of the current period is the lowest compared to its surrounding bars.
• Marking Fractals: If a fractal low is identified, it is marked on the chart with a triangle symbol and stored for further comparison.
• Finding the Nearest Fractal: Iterates through the historical data up to the defined bar limit to find the fractal low closest to the specified price level. This is done by comparing the absolute difference between the fractal low and the price level.
• Output: Returns the nearest fractal low and the specified price level, highlighting these on the chart with colored lines.

This example is useful for understanding how to implement and utilize fractal-based support levels in trading algorithms using ProBuilder language.