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Which statistical to be should be used for trend analysis of stock market or gold to make future assumptions?

I'm not sure of what you're asking but I suspect you wish to know what statistical numbers will point to market trends.

Most stock market investors will tell you that uptrends played out over a period of a few months will usually portend a somewhat reliable indicator. A day trader or short term swing trader will point to a logical and likely turn-around or trend reversal to the upside following a steep decline.

Len