code: def get_low_high_values(useAdjusted, bars):
      currBar = bars[0]
      lowestLow = currBar.getLow(useAdjusted)
      highestHigh = currBar.getHigh(useAdjusted)
      for i in range(len(bars)):
          currBar = bars[i]
          lowestLow = min(lowestLow, currBar.getLow(useAdjusted))
          highestHigh = max(highestHigh, currBar.getHigh(useAdjusted))
      return (lowestLow, highestHigh)
  
file_path: pyalgotrade/pyalgotrade/technical/stoch.py
imports: from pyalgotrade import technical
  from pyalgotrade.dataseries import bards
  from pyalgotrade.technical import ma
label_desc: Use image node_id 1 for calling a global function with example usage: get_low_high_values(useAdjusted, bars) and returns: lowestLow,  highestHigh