Double HullMA Cross

The Hull Moving Average (HMA), developed by Alan Hull, is an extremely fast and smooth moving average. In fact, the HMA almost eliminates lag altogether and manages to improve smoothing at the same time. The Hull Moving Average solves the dilemma of making a moving average more responsive to current price activity whilst maintaining curve smoothness. (hoping in less false signals).
indicator doubles the input value to make the second HullMA value, then marks the crossover

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