The vertical horizontal filter (VHF) by Adam White expresses the range of closing prices as a fraction of total close-to-close movement over a given N-day period.
highest close - lowest close
VHF = -------------------------------------
total of each abs(close - prev close)
This ratio ranges from 0 to 1. The extreme of 1 means all close-to-close movement was in one direction, so they added up to the full range. A usual value is somewhere in the middle, reflecting a mixture of advances and retreats that occur even in a strong market.
Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017, 2019, 2023, 2024 Kevin Ryde
Chart is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.