SPMA Supertrend | NALSPMA Supertrend is a trend-following framework that replaces the conventional Supertrend center with a Shock Percentile Moving Average (SPMA) .
Unlike a traditional moving average that updates on every bar, SPMA only accepts a new baseline value when the current one-bar return ranks sufficiently high relative to its recent distribution. When that percentile condition is not met, the baseline remains unchanged.
The result is an event-driven trend structure designed to respond selectively to
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