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Most indicators use a fixed zone for buy and sell signals.
Here's a concept based on zones that are responsive to past levels of the indicator. O ne approach to active investing employs the use of oscillators to exploit tradable market trends. However, these oscillator-driven systems lack the ability to evolve with the market because they use fixed buy and sell zones. Traders typically use one set of buy and sell zones for a bull market and substantially different zones for a bear market. And therein lies the problem.