David Keller is President and Chief Strategist at Sierra Alpha Research. He combines his expertise in technical analysis, behavioral finance, and data visualization in identifying investment opportunities and enriching relationships between advisors and clients. With over 20 years of experience studying behavioral finance, Keller is passionate about viewing the markets through the lenses of behavioral psychology and technical analysis. He is also the Chief market strategist at StockCharts, where he helps investors mitigate behavioral biases through technical analysis.