Co-creators of the Vortex Indicator
Etienne Botes & Douglas Siepman
Etienne Botes and Douglas Siepman introduced the Vortex Indicator in the January 2010 issue of Technical Analysis of Stocks & Commodities. They based it on J. Welles Wilder's directional movement concept and on Viktor Schauberger's studies of vortex flows in water. Little else about the authors is publicly documented.
What they argue
- Upward and downward 'vortex movement' (each bar's high against the prior low, and each low against the prior high) can be compared to show which side controls the trend.
- When the positive and negative lines cross, the trend is changing, and the wider they spread, the stronger the trend.
Sources
Traders.com: 'The Vortex Indicator', TASC January 2010StockCharts ChartSchool: Vortex IndicatorWikipedia: Vortex indicator
Summaries are Be The Puck's paraphrase of public material. Be The Puck has no affiliation with the people listed.
Vortex crossover
Rule and full recordTrend following · daily
Compares how far each day reaches above the prior low against how far it reaches below the prior high. Whichever side is stronger owns the trend.
In right now154 of 377As of the Oct 13, 2026 close.
Best risk-adjusted results against buy and hold: