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S&P 500 with 20-day, two-standard-deviation Bollinger Bands, %b and bandwidth. Bollinger Bands (/ ˈ b ɒ l ɪ n dʒ ər /) are a type of statistical chart characterizing the prices and volatility over time of a financial instrument or commodity, using a formulaic method propounded by John Bollinger in the 1980s.
The REI is most typically used on an 8 day timeframe. It changes on a scale from −100 to +100, with the overbought and oversold levels marked at +60 and −60, respectively. The range expansion index was developed by Thomas DeMark and published in his 1994 book, The New Science of Technical Analysis. [1]
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John A. Bollinger (/ ˈ b ɒ l ɪ n dʒ ər /; born 1950) is an American author, financial analyst, contributor to the field of technical analysis and the developer of Bollinger Bands. His book Bollinger on Bollinger Bands (2001), has been translated into eleven languages.
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The I-V curve for a diode showing avalanche and Zener breakdown.. In electronics, the Zener effect (employed most notably in the appropriately named Zener diode) is a type of electrical breakdown, discovered by Clarence Melvin Zener.
(a) Shows an energy diagram of n-type semiconductor in contact with redox electrolyte at the left side (yellow), and with a metallic ohmic contact at the right side. E c is the conduction band edge energy, E v is the valence band energy of the semiconductor.