The Delta indicator draws two lines: the bar average price line (OHLC)/4 and the line of the decimal logarithm of the current to previous (OHLC)/4 prices ratio.
The indicator DHLPBO (Dynamic High/Low Percentage Band Overlay). Unlike DHLBO, which displays two bands calculated based on the Highs/Lows of the range, this indicator constantly narrows the channel width by a certain percentage throughout the whole range.