HAL is Larry Dudash's computer program which analyzes daily price movements eod to determine trends. As I understand it it is a statistical model which picks out upper, lower, and mid trendlines. When price movement is statistically outside the current trend, an end to it is signalled. A new trend is born when recent price action is statistically consistent with a trend in prices.
HAL is really good at keeping you in the major trend in a trending market, but gets whipsawed in a flat market. It's better used for trading long term funds and I think it's primary purpose is appreciation with captial preservation.
Someone may want to clean up that explanation for me.
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